You can run... 可以跑 纪录片之家译制
but you can't hide... 但你躲不过
from these bullets of the future. 这就是未来的子弹
It sounds like science fiction 听起来就像科幻小说
- but we're getting close to making bullets smarter. 子弹制作的越来越精确
Bullets that can lock onto their targets, 它可以锁定目标
steer themselves and never ever miss. 自主导航永不失手
Have we created the ultimate bullet? 已经有这种“终极子弹”了吗？
Bullets come in all shapes and sizes. 子弹被设计成各种形状和尺寸
designed to wound or kill. 以达到击伤或击毙的目的
The science of ballistics has transformed the humble musket ball 弹道学的进步让400年前的滑膛枪铅弹
of over 400 years ago into the "Ranger Talon," 变成了“游侠爪”
a bullet that rips its target to pieces. 一种可以将目标炸成碎片的子弹
And the guns have also evolved 枪械也在发展
from the musket to a 50-calibre sniper's rifle. 从滑膛枪到50mm口径的狙击步枪
A bullet impact so powerful 子弹的冲击力太强了
that a single shot can punch through an armoured car. 一发就足以击穿一辆装甲车
In fact, this electronic gun may be like nothing you've ever seen before. 事实上，这种枪以前很少有
It punches out a million bullets a minute. 每分钟可以射出一百万颗子弹
Over generations, bullets have altered the face of history. 过去的岁月里，子弹改变了历史的面貌
Changed the way we wage war. 也改变了战争的方式
and shaped the world we live in today. 才形成了今天我们生活的世界
Scientists are now working towards producing a bullet that never misses, 科学家正在研制一种百发百中的子弹
a bullet that steers itself in flight towards its target 在飞行中可以锁定目标自主导航
Right now, it's still a futuristic dream 直到现在，这也只是幻想
- but it's getting close. 但离实现越来越近
We have to ask: 我们不禁要问
"Could this be the ultimate bullet?" 这就是所谓的“终极子弹”吗？
Ballistics is the science of the motion, 弹道学是研究
flight and impact of a projectile or bullet. 弹射装置或子弹的运动、飞行及撞击的学科
To study a bullet in flight 要研究飞行中的子弹
- the images must be slowed down. 就要使子弹飞行画面慢下来
A specialist slow-motion camera 一架专业的高速摄影相机
captures these incredible images of bullets traveling at the speed of sound. 捕捉到了子弹以声速飞行的画面
This is a gunshot slowed down over 800 times 这是射击时800倍的慢镜头
A bullet leaving the barrel travels so fast 子弹离开枪管的速度如此之快
that it squeezes the air directly in front of it 对它正前方的空气造成挤压
and pushes it to the sides 并推向两侧
- creating a circular shockwave. 造成了一个环形冲击波
The bullet is now on its way. 现在子弹在飞行中
Each round of ammunition has 2 main parts 每一个完整的子弹都有两部分
- the case and the bullet. 弹壳和弹头
The bullet is made of a soft lead core 弹头的里面由软铅构成
covered in a copper or steel coating. 外面包裹着铜或不锈钢
The case holds the explosive charge. 弹壳里面是火药填充物
Firing the gun sets off an unstoppable chain of events. 射击时是一连串的连锁反应
The firing pin hits the casing 撞针击打弹壳
- the charge inside burns and explodes. 里面的火药燃烧并爆炸
Expanding gases force the bullet out of the casing, 气体膨胀将弹头与弹壳分离
and down the barrel. 弹头进入枪管
But it's taken over 400 years 但是整整400年
for the bullet to reach this lestication. 子弹才发展到这种初期阶段
To uncover the ultimate bullet, 为解开“终极子弹”的面纱
you have to begin with the early ones. 我们先看看早期的子弹吧
The history of bullets is bound to the guns that fire them. 子弹的历史和枪是密不可分的
Early bullets were simply balls of lead shot from primitive guns. 早期的子弹由铅丸做成， 用较原始的枪发射
As late as 1776 guns were basically still small hand cannons. 直到1776年仍然停留在小的盒子炮上面
The gunpowder and ball were loaded into the front of the barrel 枪药和弹丸从枪口装填
- just like a cannon. 就像炮弹一样
Awkward to load and difficult to use. 既难装填，又难使用
Early muskets, used massive lead balls that are huge by modern standards 按照现在标准， 早期滑膛枪使用的铅弹丸实在是太大了
up to three quarters of an inch in diameter 直径可以达到1.75英寸
The really big problem? 最大的问题还不在与此
Accuracy. 而是精度
At more than 100 yards, 100码以外
even the best marksmen had trouble hitting a man-sized target 即使最好的射手也难以射到人一样大的目标
with a bullet shot from a smooth barreled musket 从光滑的枪管射出的子弹有很大问题
Firearms instructor at Texas Police Academy Cullen Grissom explains. 来听听德克萨斯警察学院讲师Cullen Grissom的解释
The disadvantage of a smooth bore musket is the unpredictability. 光滑枪管的缺点就是不稳定
It's not stabilized in flight. 子弹飞行时根本不稳定
To some extent it's the equivalent of throwing rocks. 简直就和我们扔石头差不多
No ball fits the smooth tube perfectly. 弹丸不可能和光滑的枪管配合完美
It bumps and bounces around as it hurtles through the barrel. 当它急速通过枪管时将与枪管产生碰撞发生弹跳
By the time it emerges, 所以从枪管出来时
its flight path is unstable and inaccurate. 它的飞行路线就不稳定，也不精确
Gunsmiths discovered the key to making bullets fly straight hundreds of years ago. 几百年前枪械师发现了使子弹稳定飞行的关键
Residue from the explosions clogged up the guns. 火药的残渣阻塞了枪管
So gun-makers cut grooves inside the barrels 所以枪械制造师在枪管里面刻槽
to collect the soot and keep the guns from clogging and blowing up. 使残渣集中的槽里， 使枪免于阻塞和炸膛
That had an unexpected side effect. 但这却出现了意想不到的副作用
To their amazement, 让他们惊奇的是
gunsmiths found that the grooves hugely improved the accuracy of the guns. 刻槽大大提高了枪械的准确度
These spiraled grooves inside the barrel 这些枪膛内的螺旋刻槽
became known as rifling. 就是著名的“来复线”
They force the bullet to spin as it travels down the barrel. 来复线使子弹穿越枪膛产生自旋
And a spinning bullet flies straighter and hits more targets. 旋转的子弹飞行路线更直 射击精度更高
We need two players and a football 我们用两个运动员和一个足球来说明
to demonstrate how spin makes a projectile more stable. 为什么自旋让子弹飞行更稳定
When he doesn't spin the ball, 如果不给球加旋转
the quarterback's throw is off target. 四分卫的传球没有到位
But, using the laces to spin the ball in flight, 但是，如果踢球时加了旋转
his throw accurately finds its receiver. 就能精确的传给队友
The force at work when a ball - or a bullet - spins 当球或子弹旋转时产生的作用
is called gyroscopic stability. 被成为“陀螺稳定性”
Think of a child's spinning top. 就像小孩的陀螺
The gyroscopic effect forces it to remain stable 选装稳定性使它保持稳定
as it spins on its axis. 以它的轴为中心自旋
The same is true for a bullet. 子弹也是一样
The faster it spins - 自旋的越快
the more stable it becomes 越稳定
That's because a spinning bullet 这是因为子弹的自旋
can better resist forces trying to knock it off its path. 可以更好地阻止它脱离飞行路线
With grooves in the barrel the rifle followed the musket, 因为有了膛线，来复枪取代了滑膛枪
firing accurately over much longer distances. 射击的距离和精确度都得意提高
Among the earliest was the Kentucky rifle. 最早的来复枪是肯塔基枪
accurate to 200 yards 200码仍很精确
but still taking about a minute to reload. 但仍需1分钟的时间装填弹药
At the end of the 19th century 19世纪末期
came the Spring Field breech loading rifle 出现了春田（美国一个大的兵工厂）后装药步枪
with twice that rate of fire- 射击速度提高了一倍
and accurate enough to slam 6 bullets 可以精确地将它的6发子弹
into a two foot square target 100 yards away. 命中100码远的2平方英尺的目标
But it's speed was still no match for the Native Americans 但仍不能和美洲土著人的射箭速度相比
who could shoot 12 arrows in a minute. 他们可以在1分钟内射12支箭
The US military gained some ground with Samuel Colt's invention of the Colt revolver 由于Samuel Colt发明了柯尔特左轮手枪， 美国军队才有了较大进步
- a reliable handgun firing bullets at what was then a phenomenal rate. 这种手枪性能可靠，射速很快
As fast as 6 shots in just 6 seconds. 它可以6秒内射击6发子弹
The Colt answered the rapid fire question 左轮手枪解决了速射的问题
but only for close quarter combat. 但只适于地面近距离战斗
As well as the Colt, 和柯尔特手枪一样
the Winchester repeating rifle gradually introduced from 1860 1860年引入的温彻斯特连发枪
finally gave the military the edge. 让美国军队优势凸显
The Winchester rifle was accurate to 200 yards 这种枪的精确度可以达到200码
and could fire 9 bullets without reloading. 可连发9枪而无需重新装填
The Colt and the Winchester were so effective 柯尔特左轮枪和温彻斯特连发枪的应用非常有效
that they were dubbed the guns that won the west. 美国军队装备这些枪战胜了西部的印第安人
Guns were developing fast. 枪的发展相当迅速
But bullet technology was changing too. 子弹的技术也在前进
Invented in 1883- 在1883年
a totally new type of bullet. 发明了一种全新类型的子弹
Made of lead but now partially covered in a copper jacket 由铅制成但表皮由部分铜包裹
They were known as "full metal jackets." 它们被成为“全金属外壳”
The copper was much harder 铜更加坚硬
and so held its shape better when exposed to the ferocious heat inside the barrel. 当受到枪膛内高温冲击时， 也能较好的保持其外形
You could use a more powerful charge, 所以可以使用威力更大的火药
giving faster speeds, and better accuracy. 来提高速度和精确性
The bullet had come of age 子弹的设计进入了一个新时代
essentially the same basic design as exists today. 其基本设计和现在的一模一样
Things were moving fast. 事物的发展太快了
In just over 300 years 在过去的300年里
ballistics developed from a musket firing three shots a minute, 弹道学从最初的滑膛枪每分钟3发
with a range of 100 yards, 射击距离100码
to the Maxim machine gun: 发展到了马克希姆机枪
- 600 bullets a minute with an effective range of half a mile. 每分钟600发，有效射距半英里
In the 20th century, 在20世纪
this technology proved itself in the deadliest conflicts of our time. 这项技术在几场大的战争中证明了自己的价值
But rate of fire is only part of the story. 但射速只是枪械性能的一部分
There are a bewildering number of different types and sizes of bullets. 有太多令人混乱的关于子弹型号和尺寸的数字
And when you're face to face with a dangerous enemy, 当你和一个危险的敌人面对面时
what really matters is making sure that they can't shoot back. 最重要的就是确保不给他还手的机会
Your choice of ammunition might mean the difference between life and death. 弹药的选择将决定生死
So what is the best bullet to stop the target dead in their tracks? 那么什么是最好的子弹， 可以让对手死无还手之力？
The most effective bullet is a bullet that stops the target in just one shot. 最有效的子弹就是能置对手一发毙命
But there are circumstances 但要视情况而定
when it's better to wound the enemy rather than kill them. 如果只是想让对手受伤而不是置之余死地
That's the view of wound ballistics expert Dr Martin Fackler 这是创伤弹道学专家马丁.菲克勒博士的观点
From a military environment one of the theories is that 从军事角度的理论来说
wounding is better than killing the enemy 让敌人受伤比杀死他更有利
because if you wound the enemy 因为如果你让敌人受伤了
then he must be hauled off the battlefield 那么他必须撤离战场
and a person who's got his hands full of stretcher 一个伤势严重的伤员
can't be shooting back at you. 是不会向你还手射击的
But in urban law enforcement things are very different. 但在市内警察执法时情况就不同了
The ultimate bullet should allow you to shoot an assailant. 最后的子弹只允许射击攻击者
Ideally without them shooting back 理想情况是他们不能还手
They call it the 'one shot stop'. 他们称之为“一发定乾坤”
But this is a last resort, 但这只是最后的手段
police only shoot to save the life of an officer or innocent bystanders. 警察只有在保护政府官员和无辜百姓时才能开枪
And that usually happens at short range. 这种情况下射击距离都很短
The average police shooting in the United States occurs at 10 feet or less 在美国警察的开枪距离平均为10英尺或更短
At that range, wounding is not enough 这样的距离，只让敌人受伤是不够的
- the officer must instantly stop a perpetrator from firing back. 警察必须立即阻止罪犯还击
They'll break into a room and, 他们会强行进入房间
and people there will have arms 手上有武器
and they'll be facing them at 10 or 15 feet 和他们在10到15英尺的距离面对面
and they'll be shooting back at the policemen. 还会向警察还击
The most effective shot, would be a, a shot in the head, 最有效的射击就是击中头部
this would be most likely to incapacitate. 这可能是阻止罪犯最好的方法
But in the heat of close combat 但在近距搏斗最激烈的时候
a head may be moving and hard to hit 头部在不停移动，很难击中
So police training says: 所以警察训练手册上说：
Aim for the body's center of mass. 标准身体的质心
Though sometimes even that is not enough. 但有时候这么做还不够
Even the best shot that goes right in the centre of mass, 即使最好的一击， 能正好击中质心
and goes through the heart, 并打中了心脏
cannot be counted upon to stop that person immediately. 这也不能立即使阻止歹徒
A person who, who has his heart penetrated by a bullet 一个被打中心脏的人
could well keep shooting for 20 seconds. 还能持续射击20秒钟
Because severely injuring a person's heart 因为一个人即使心脏受了巨大的创伤
does not stop his brain from thinking 仍不能阻止他的脑子继续思考
- until it's finally starved of oxygen. 直至脑子因缺氧而停止思考
So what bullet is the best for a one shot stop? 那么，什么样的子弹才是最好的能一击制敌呢？
That depends on the type of gun. 这和枪的类型密不可分
For police work the handgun is the weapon of choice. 对警察来说手枪是最好的选择
Handguns and bullets come in different sizes 手枪和它的子弹有各种型号
- measured by the caliber - the diameter of the bullet. 以口径来测量， 也就是子弹的直径
This is measured in either American inches 子弹口径标准有两种：美制英寸标准
or in the European metric system. 和欧洲公制标准
The 9mm, a German Caliber, 一种德国9mm口径的子弹
is point three-five of an inch in diameter 等同于0.6英寸直径的子弹
The 45 is American 45是美国标号
and point four-five of an inch in diameter. 等同于0.8英寸直径的子弹
In law enforcement both types of weapons are popular. 这两种类型的武器被广泛应用于执法部门
When it comes to the stopping power of handguns 当提到手枪的阻吓作用时
- size really does matter. 口径才是最重要的
The difference between the 9mm and the 45 9mm和45之间的区别就在于
of course is diameter of the bullet. 它们是两种不同口径的子弹
The 45 is double the mass of the 9mm bullet. 45的重量是9mm弹的两倍
The bigger the bullet, the bigger the impact, 子弹越重，冲击力越大
the bigger the hole. 造成的伤口越大
But the bullet design is also crucial. 子弹的设计也相当重要
Most handgun bullets are either round nose or hollow point. 大多数手枪子弹都具有圆形的头部 或者顶端中空
The round nose is a traditional "full-metal jacket" bullet, 具有圆形头部的子弹 就是所谓的“全金属外壳”子弹
made to create a bigger hole in the target. 这种子弹可以在目标物上造成更大的伤口
The hollowpoint has a concave depression cut into the tip 顶端中空的子弹 在弹尖处有一下切凹槽
designed to fragment into pieces. 这种设计可以使子弹产生更多破片
But which has the greater stopping power? 但哪一种有更强的阻吓威力呢？
The most effective bullet doesn't just punch right through the target 最有效的子弹 不仅仅是能击穿目标
- It creates serious internal damage. 还能在目标内形成巨大伤害
Let's take to the shooting range 我们把镜头转向靶场
to see how each bullet performs. 看看哪种子弹更厉害
First, the roundnose bullet 首先来看看圆形头部的子弹
The roundnose penetrates the target, 击穿了目标
and goes right through, 径直穿过
leaving a clean exit hole 留下了一个清晰的洞
If this was a bad guy, 如果这是个坏蛋
he'd probably still be firing at the police officer. 他很有可能还在向警察射击
Next: a hollowpoint bullet. 下一个，空头弹
Watch the container on the left 看左边的箱子
The bullet totally destroys the target. 完全将目标毁灭
On the streets, 在巷战中
a hollowpoint gives the officer more chance of stopping the criminal with one shot 警察使用空头弹将罪犯一击致胜的可能性会更高
The hollowpoint expands on impact to almost 3 times its size. 空头弹在击中目标时 可以膨胀到自身原来尺寸的3倍
The expanding effect means that the bullet dumps its power inside the body 膨胀效果意味着 子弹将它的能量全都留在了敌人身体里面
damaging more tissue than a normal round nose bullet. 对身体组织产生的破坏性要大于圆头子弹
The hollowpoint is commonly used as an antipersonnel round. 空头弹常作为杀伤性武器来使用
It's designed to damage more tissue, 其设计可以伤害更多的人体组织
by opening up somewhere to a flower 击中目标后子弹扩散膨胀的有点像花一样
so it has a larger wound channel. 所以可以造成更大的伤口
A larger wound means a greater chance of hitting an organ, 大的伤口意味着对器官的伤害可能性更大
cutting nerves or severing an artery and so stopping the target. 切断神经或伤害动脉来阻止目标
This is state of the art in hollowpoint bullet technology. 这就是空头弹技术的发展水平
The RANGER TALON. “游侠爪”
When it hits flesh it expands, 当它击中身体时便膨胀
exposing razor sharp edges that slice through soft tissue. 剃刀一般锋利的边缘便暴露出来 切割人体的软组织
Its efficiency can make it the safest option. 其有效性使它成为最安全的选择
Fewer shots need to be fired to stop a target. 极少数的射击是阻止目标才开火的
And less shots fired mean less chance of hitting a bystander 少的射击次数意味着伤害围观者的几率越小
That stopping power makes the hollowpoint the best handgun bullet. 这使空头弹成为最好的手枪子弹
But, in close quarter combat 但在地面近距搏斗中
it can't compete with the brute force of a weapon 它还是不能和具有强大火力的武器相比
that guarantees the bad guy is unlikely to be firing back. 不能保证犯罪分子不会回击
That weapon's the shotgun. 这种武器就是霰（xian，第四声）弹枪
It's certainly not the perfect weapon 它当然不是完美的武器
- it's smooth barrel, like a musket, 它平滑的枪膛就像滑膛枪
makes it inaccurate over all but the shortest distances. 使它一点都不精确 贴身时除外
But at close range it can blow the bad guys away. 但在近距离时它可以将犯罪分子打飞
The shotgun is the weapon commonly carried by a uniformed patrol officer in their car. 穿着制服、坐在车子里巡逻的警官经常使用的就是这种霰弹枪
One buckshot cartridge fires 9 pellets at one time 大型铅弹枪（一般狩猎用）的子弹 可以一次打出9发小铅弹
which is roughly the equivalent of being struck by 这大致等同于一次射击
nine 9mm bullets all at the same time. 打出了9发9mm弹
Unlike a solid bullet, 和实心子弹不同
each shotgun cartridge holds multiple lead pellets, 每个霰枪弹里有许多小铅球
which spread out as they leave the barrel. 从枪膛出来后就四散开来
It's kind of the equivalent of picking up a handful of rocks and throwing them. 某种程度上就像抓起一把石子 然后把它们扔出去
Shotgun cartridges can carry many different types of shot. 霰弹枪弹壳可以装填多种类型的子弹
From a round with dozens of lead balls designed to bring down a bird, 从打鸟用的装有数十个小铅球的子弹
to a cartridge whose one solid slug can stop the target dead in its tracks. 到可以将运动目标击杀的实心弹
The most common law enforcement cartridge holds buckshot 大多数警用弹都是铅弹
- nine separate balls. 9个独立的小铅球
The range demonstrates the shotgun's impact 其射程证明了它的冲击力
First the buckshot into a 2 inch hunk of wood 首先射击一个2英寸厚的大木板
The wood's no obstacle at all 木板根本挡不住它
and the buckshot peppers the water tank behind it 把后面的水箱也炸的四处飞溅
But if you think that's devastating 如果你觉得它的威力很大
Wait for the slug. 那就再来看看实心弹的威力
Straight through the wood 直接击穿木头
and the water container is history. 连水箱都不复存在了
A shot gun slug literally turns a shotgun into a rifle. “shot gun slug”字面意思就是 将猎枪便成了步枪
With a proper sighting system on a shot gun 加装了固定瞄准体统的猎枪
the slug is effective out to 100-150 yards. 其有效射程可达100－150码
It's a very large projectile 子弹很大
and a 12 gauge you're looking at an ounce and a half of lead 你看到的是一个12mm口径 1.5盎司的铅弹
traveling at about 1250ft per second. 以每秒1250英尺的速度飞行
It hits like a sledge hammer. 它的冲击力就像一个大锤子
If the police shoot a shotgun at short range and hit the heart, 如果警察使用猎枪近距离射击 并且击中罪犯的心脏
this person will most likely go down right away, but 估计这家伙立马就爬下不动了
It'll get the job done and you know, 目的达到了，就像你看到的一样
the, the gunfight will be over within fifteen seconds. 枪战将在15秒内结束
The shotgun and the handgun are the weapons of choice for short range fighting, 猎枪和手枪在近距地面战斗中都很有用
but sometimes law enforcement officials need long-range firepower. 但有时警察们需要远距离的火力
- and that means the rifle. 也就是步枪
The rifle is a very precise weapon it allows us distance. 步枪是很精确的武器， 有较远的射击距离
In law enforcement we want to create time, distance and cover. 在警用装备中我们需要速度快 射程远且火力大的武器
We wanna put something between us and the threat. 在我方人员和威胁之间进行选择
The rifle allows us to do that. 步枪就是首选
The spiraled grooves in the barrel give a rifle bullet long-range accuracy. 枪膛中的来复线使步枪在长射程时仍具有高精度
In the right hands it can hit a target 好的射手用它可以击中目标
that the human eye only sees through the cross-hatches of a high-powered telescopic sight. 只需要用眼睛通过高性能望远瞄准镜瞄准目标就行了
Some rifle bullets are deceptively small 步枪子弹相当小
- just half the size and a quarter of the weight of a 45 caliber bullet. 它只是45口径子弹尺寸的一半 重量的四分之一
But three times more powerful because of their speed. 但由于速度快 它是45口径弹威力的3倍
The faster the bullet the more energy it has. 子弹速度越快，其能量越高
And more energy means devastating damage. 能量高意味着破坏作用大
It's very effective, far more effective than a handgun. 步枪是很有效的武器 手枪没法和它比
A long-range rifle bullet is as streamlined as possible 长射程步枪子弹尽可能是流线型的
to cut wind resistance and increase speed. 以减少空气阻力、增加子弹速度
The rifle barrel can withstand greater pressure than a handgun 步枪枪膛能承受的压力比手枪高
so bullets contain more powder for a bigger explosion. 所以步枪子弹装药更多 发射时威力更大
Take a look - the handgun powder burns away quickly. 让我们来看看 手枪子弹装药很快就烧完了
But the rifle powder burns a lot longer. 步枪子弹装药燃烧时间要长的多
This longer-lasting explosion, gives much more energy to the rifle bullet. 装药燃烧时间越长 提供给步枪子弹的能量就越高
The final factor is the length of the barrel. 最重要的因素是枪管的长度
The bullet spends more time inside a longer barrel and picks up more energy. 子弹在枪管内停留时间越长 它聚集的能量越多
More energy... more speed. 能量越多，速度越快
More speed... much greater power. 速度越快，威力就越大
Power is the rifle's great asset 威力大是步枪最大的优点
but that long barrel is a great disadvantage 但枪管太长也有缺点
especially when lawmen need surprise on their side. 特别是执法人员想突然袭击的时候
Dan Severn of the College Station SWAT team in Texas. Dan Severn是德克萨斯州的特警队员
The length of the weapon makes it a little difficult when we are searching a house. 步枪的长度使我们搜索房间时有点困难
We don't want to give the bad guy notice that we are coming 我们不想让罪犯觉察到我们进来了
because 16 inches of rifle barrel sticking around the corner before we can see the bad guy 因为在我们看到犯罪分子时 16英寸的枪管不能马上调转过来
So the shorter weapon gives us the ability to put our eyes on the target 所以短的枪能使我们更加专注于目标
the same time as the same time the weapon comes on the target. 在看到目标的同时枪也在指着目标 能随时开火
A short barrel is the best tactical choice in close urban combat. 在近距地面搏斗中 短枪管是最好的战术选择
But in a war zone it's very different 但在战场上就不同了
For 40 years the US military has used the 556 cartridge - with the M16 rifle as its weapon platform. 40年来美军一直用556制式弹夹 和M16步枪
It has proved itself a winning combination of speed and power 结果证明这是速度和威力完美的结合
with an effective range of 900 to 3000 feet. 其有效射程为900至3000英尺（约270～900米）
But even it can't stop a truck with one shot. 但它一发子弹不能打坏一辆货车
This weapon can. 然而这种武器可以
This is the 50 caliber rifle. 它就是50mm口径步枪
The bullet's size and its explosive charge twice as big as a bullet from the M16 它的子弹尺寸及装药量都是M16子弹的两倍
makes this one of the most powerful rifles today. 这使它成为当今最有威力的步枪之一
Its hand held artillery. 它的支架可以把它支起来
And so powerful that from 1.5 miles away, 即使距离1.5英里仍具有极大威力
it hits with 9 times more energy than the wallop of a 44 Magnum fired at point blank range. 它的威力是44美格南手枪（又名沙漠之鹰，威力大，后坐力大） 近距离射击时的9倍
So what can these monster bullets do? 为什么这种魔鬼弹这么厉害？
From 50 yards away the 50 caliber smashes through 3 tanks. 50口径弹可以连续打碎50码远的3个水箱
This round will penetrate 1 inch of armour plating from a distance of 200 yards. 这次将要穿透200码远1英寸厚的装甲板
If the 50 caliber hits your torso or head 如果你的身体或头被50口径弹击中
- you'd be dead. 你就不可能生还了
We have bullets of nearly every size and design 子弹的尺寸和形状各部相同
but how do bullets perform their deadly task 但它们是怎样完成致命任务的呢？
What's the science of a bullet's impact on a human body. 这就是所谓的子弹冲击人体科学
So far we've seen the tremendous stopping power of the hollowpoint bullet, 前面我们看到了空头弹巨大的连带力
the devastating short range brute force of the shotgun. 猎枪的短程巨大破坏力
and the astounding capabilities of the high powered rifle round. 以及骇人强火力步枪
Most bullets are designed to stop a human 大多数的子弹设计都是针对人的
creating the most devastating wound possible 是为了造成最大程度的破坏损伤
So, what kind of ammo does what kind of damage to the human body? 那么， 哪种子弹对人体造成哪种伤害呢？
To see how bullets injure bodies we employ the science of wound ballistics 为解释子弹对身体的伤害 我们要了解创伤弹道学
A bullet striking the human body causes two main types of damage 子弹击中人体后 产生两种破坏效果
Handgun bullets, traveling at lower speeds, 手枪子弹速度较慢
will create what is called 'crushing' injury. 造成的伤害就是所谓的“挤压伤”
The bullet punctures the skin crushing the tissue and creating a wound "channel" 子弹击穿皮肤，挤压人体组织 随着 子弹在身体内穿行
as the bullet tunnels through the body. 形成一个伤口的"洞"
If you took a small cube of a piece of steak, 如果你拿一小块方形的肉
put it on an anvil and pounded it with a heavy hammer, 将它放在砧板上 用一个重锤打击
you would have a, a mushy liquid tissue, 你将看到肉变成了粘稠状的象液体一样的东西
that's what tissue becomes from the crush mechanism. 这就是人体阻止在受到挤压作用时的变化
By "projecting" pictures of actual wound paths onto a human body, 通过人体真实伤口的投影图片
Doctor Fackler pinpoints exactly what damage bullets cause. Fackler医生可以精确的指出子弹造成的伤害
A.45 roundnose bullet fired from a handgun creates this wound. 这是用手枪发射的45mm圆头子弹造成的伤口
It penetrates deeply, but leaves minimal crushed tissue in its wake. 它穿的很深， 但轨迹上有少量被挤压阻止的组织残留
Switch to a hollowpoint from the same handgun and the wound is very different. 用同一把枪将子弹换成空头弹 伤口就完全不同了
It hasn't penetrated as far but has dumped all its energy in the body. 它穿的不深，但其能量全部留在了身体里
There's far more tissue destruction. 破坏了更多的组织
You can see the marked contrast in the size of the hole 可以看到伤口尺寸的明显对比
because the bullet has mushroomed and doubled its diameter. 因为子弹象蘑菇一样散开 其直径扩大了两倍
Handgun bullets travel at about the speed of sound. 手枪子弹的速度基本和声速相同
Rifle bullets - up to 3 times faster. 步枪子弹则是声速的3倍
And that means more damage on the receiving end. 这也意味着受体将受到更大的伤害
And more work for trauma surgeons like Dr Wang. 来看看外科医生王的工作
A single shot to the arm from a hi-velocity bullet will mean bone will be broken 一个高速旋转的子弹仅一发击中胳膊 就能造成骨折
to the point where often require amputation to salvage the arm and the life of the victim. 简单的数，需要截肢来保住胳膊和挽救患者生命
Handgun just passes through and there's usually just a little bit of muscle tear. 手枪子弹只是简单的穿越人体组织 造成一点肌肉撕裂
A rifle bullet packs so much force, that it can kill without piercing flesh. 步枪子弹的力量太大 可以直接将人杀死而不需要穿越人体
Even with the correct protective headgear 即使戴着头盔
just a glancing blow by hi-velocity bullet can lead to coma and death 只要一击，仍能将人击昏或死亡
The rifle bullet creates a devastating type of wound. 步枪子弹造成破坏极大的伤口
This is called a temporary cavity. 被称为暂时空腔
It's the same thing as a dropping a stone into a pool of water, 就像将一个石头丢进一个小水塘
you see a temporary splash, 你将马上看到水花四溅
we have what we call the temporary cavity which is nothing more than a splash in tissue. 除了人体组织四处飞溅，什么都不剩 这就是“暂时空腔”的由来
On impact the splash creates a hollow space - 30 times the size of the bullet 在击中的瞬间，血肉飞溅 造成的伤口是子弹尺寸的30倍
Take it up another level. 再来看看另外的
A close-up blast from a shotgun loaded with buckshot. 猎枪射击的冲击波特写
It tears the body apart. 将人体整个撕裂
What this shows is that they would almost all be contained in the chest. 这些显示的基本都是在胸部
Each one of these buckshot makes a separate path through tissue 猎枪的每次射击都有不同的轨迹
and all the paths are very close to one another and they sorta make hamburger out of the tissue 但这些轨迹非常接近 有点像将人体打成了肉饼
I don't think a wound of this type would be survivable. 这种伤口足以致命
Soldiers and police officers regularly face these weapons. 士兵和警察要经常面对这种武器
So how do they protect themselves? 那么他们怎么保护自己呢？
The answer is body armour. 答案就是防弹衣
There are 2 types of Modern body armor: hard and soft. 现在有两种类型的防弹衣：硬的和软的
Designers developed hard body armour to deflect the enormous power of a rifle round. 硬防弹衣的设计主要是将步枪子弹的巨大威力反射掉
It consists of thick ceramic or metal plates and works like a medieval suit of armor. 它由厚的陶瓷片或金属片组成 有点像中世纪的盔甲
The armor absorbs the energy of most bullets. 这种防弹衣能吸收绝大多数子弹的能量
In law enforcement soft body armor is designed mainly to stop a hand gun bullet. 警用软防弹衣主要对付手枪
It's flexible protection worn like a jacket 它很柔软，可以象夹克一样穿起来
that allows more movement than hard armour 行动起来比硬防弹衣要方便
Armored clothing stops a bullet by working like a very strong net. 软防弹衣的防护就像一张强大的网
Think of a soccer goal. 就像足球
The net is made up of interlinking lengths of string. 球门的网是由很多长绳编起来的
When a player kicks the soccer ball towards the goal, 当球员将球踢向球门
it carries energy - like a bullet round. 球就有了能量，就像子弹一样
When the ball hits the net it pushes into the strings. 当球撞到网时推动绳子
Each string pulls others within the web, spreading the impact over a wide area. 网上的绳子每根都连着另外一根 将球的冲击力四散开来
Making the entire the net absorb the ball's energy. 网吸收了球的全部能量
A soft bullet proof vest absorbs energy the same way 软防弹衣的工作原来也是一样的
The Vests are woven from Kevlar. 软防弹衣由芳香聚酰胺纤维编织 （Kevlar是商品名，又名凯弗拉，美国杜邦公司生产）
Kevlar is lightweight, Kevlar很轻
but pound for pound is five times stronger than steel. 但一磅的Kevlar是相同质量钢强度的5倍
Weave it into a dense net and you get massive energy absorbing results. 将它编织成厚密的网 就能达到有效吸收能量的效果
When an officer wearing soft body armor who is shot 当穿软防弹衣的警察受到射击时
generally suffers some kind of bruising or contusion behind the vest 一般只会造成一定程度的擦伤或撞伤
because if the amount of energy generated but it's dissipated. 因为即使撞击产生了能量 但能量是散开的
Here's how it works in the real world. 下面是它的真实效果
First the soft armor… 首先软防弹衣
From short range Grissom fires a 9mm. 首先近距离Grissom枪使用9mm弹
A 45 caliber Bullet. 45口径子弹
Then a shotgun loaded with buckshot. 然后是装铅弹的猎枪
The vest's outer layer stops both the 45 and the 9mm bullets, 防弹衣的外层有效阻止了45口径弹和9mm子弹
and one of the shotgun pellets. 以及一发猎枪弹
The other 8 shotgun pellets lodged in the inner layers of the vest. 另外8发猎枪弹跑到防弹衣的内层了
The soft armor stopped everything that was thrown at it. 软防弹衣可以阻挡住任何冲向它的物体
But it wouldn't stop a rifle round. 但挡不住步枪子弹
For that we need the hard ceramic plate armour 对步枪子弹需要硬的陶瓷防弹衣
Grissom fires a 7.62mm snipers round at short range Grissom近距离射击7.62mm狙击子弹
- this bullet is 5 times more powerful than the 45 round. 这种子弹的威力是45口径弹的5倍
You see the rifle round strike and you'll see the ceramic separated 可以看到步枪子弹被阻止了 防弹衣的陶瓷片也碎了
The outer ceramic has taken the brunt of the force 外层的陶瓷片吸收了子弹的冲击力
- the bullet lodging in the metal back plate. 子弹嵌在了后层的金属支撑片上
You see the pieces of ceramic, 可以看到陶瓷碎片
this is what's left of the bullet. 这就是子弹过后留下的东西
But the bullet has not penetrated the armor. 但子弹没有击穿防弹衣
Soft armour works for handguns and shot guns 软防弹衣对手枪和猎枪有用
and hard armour for rifles. 而硬防弹衣则对步枪有用
It's all part of understanding the behavior of bullets. 完全理解子弹的行为
And that can help solve crimes and even put a killer on death row. 有助于解决犯罪问题 甚至有助于将杀人犯绳之以法
A bar in Pittsburg Pennsylvania. 宾夕法尼亚州匹兹堡市的一个监狱
A crime was committed here 一个罪犯在这服刑
- and this is the man who used the science of bullets to put a killer in Jail. 这是一个利用子弹科学将杀人犯绳之以法的人
Blasé Kraeer is a detective with the mobile crime unit of Pittsburgh City Police. Blasé Kraeer是匹兹堡警察局流动犯罪组的一名侦探
We respond to homicides, robberies, burglaries and our main function 我们主要负责杀人、抢劫和入室盗窃
is to respond to felony incidents and do the physical and forensic portion of the investigation. 我们的主要职责就是重罪事件 并负责实物证据和法庭辩论的调查
The following story is based on the police records of the actual crime. 下面的故事就基于真实犯罪的警察记录
It's June 2004, at a neighborhood bar. 2004年6月，在附近的一个酒吧
An argument between a man and a young woman is spiraling out of control. 一名男子和一个年轻女子发生争执 场面失去控制
Furious, she leaves and calls her boyfriend. 这名女子很生气离开了，叫了她的男朋友
Minutes later, the boyfriend speeds up in his car 数分钟后，她的男朋友开着车飞驰而来
and fires shots into the bar, killing the man. 向酒吧里面开火，杀了那个男的
By the time Detective Kraeer arrives 这时候Detective Kraeer赶到了
police have caught the boyfriend. 警察 抓住了那名女子的男朋友
He's admitted firing several shots into the bar - in anger… from a moving car. 他承认他很愤怒，开着车向酒吧开了好几枪
That would make it a drive-by crime not intentional murder 这将使他成为驾驶犯罪而不是蓄意谋杀
- 3rd degree murder with at most a 20-year sentence. 3级谋杀最多判20年监禁
But detectives suspect he's lying. 但调查戳穿了他的谎言
If they can prove he stopped his car, 如果他们能证明他停了车
he faces Murder One and a possible death sentence. 那就是一级谋杀，可能被判死刑
Only ballistics can prove what really happened 只有弹道学才能证明真实的情况
Firing a gun from a moving car creates bullet flight paths from several different angles. 从行驶的车中射击 子弹的飞行角度有好几个
The forensic evidence may lead Kraeer to the truth 法庭证据将表明Kraeer是对的
But first he has to find the bullets… 但他首先要找到子弹
We determined that 4 shots had been fired into the bar 我们检查了四发射向酒吧的子弹
two were lodged in the front door of the bar 2颗嵌在了酒吧门前的树里面
one round lodged in the far wall of the kitchen 一发嵌在了厨房的墙上
and the forth round had shot our victim in the head. 第四发击中受害人致其死亡
Using ballistic rods and lasers, 利用弹道手枪和激光
Kraeer recreates the bullet trajectories and determines where they were fired. Kraeer复制了子弹运动轨迹 并查明了它们的射击地点
We had three holes we could work with to run out rods. 我们用弹道手枪对三个洞进行模拟
This really gave us a good, accurate depiction of where the bullets came from. 这给了我们一个真实精确的画面 也就是子弹到底从哪射击的
As he works on, tracing the bullet paths backwards, the truth emerges. 追踪子弹的运动轨迹 真相也就大白于天下来le
The bullet trajectories all originated from the same place. 所有的子弹轨迹都来自一个出发点
All indications were that the shots were fired from a stopped location. 所有迹象表明射击是在一个固定位置
This was not a drive by shooting. 这不是驾驶射击
Kraeer's investigations prove that the perpetrator was lying Kraeer的调查显示罪犯在说谎
he had stopped his car and aimed at the victim 他当时停下了车，向受害人射击
This was a pre-meditated killing. Murder one 这是有预谋的杀人 一级谋杀
It showed he fired at our victim and that it was an intended incident. 结果显示他向受害人射击 并且是有预谋的
He was convicted of first degree murder which is a death penalty in the state of Pennsylvania 他最终被判定为一级谋杀 在宾夕法尼亚州这是死刑
Studying bullets gives the police another method of solving crime. 研究子弹给警察破案提供了另外的方法
The firearms lab examines every gun seized at a crime scene 轻武器实验室研究了每个在犯罪现场使用的枪
tests determine if it's been used in any previous crime. 来检测它是否在以前的犯罪中被用过
because as anyone who has ever watched a TV crime show knows 因为每个看过犯罪片的人都知道
the act of firing a bullet makes that bullet unique. 每一次射击的子弹都是独一无二的
British Police officer Henry Goddard discovered the phenomenon in 1835. 英国皇家警察Henry Goddard在1835年发现了这一现象
The science is now known as bullet forensics or bullet matching. 这门科学就是现在所谓的“子弹侦破”或“子弹匹配”
The techniques are simple but effective. 这个技术简单而实用
They can match any bullet 它们可以匹配每一个子弹
- or even a bullet fragment - to the gun that fired it. 即使是子弹破片 也能和发射子弹的枪匹配
Dents from the firing pin and scratches caused by the guns rifling, 撞针的印记和膛线摩擦的痕迹
are as distinctive and individual as a person's signature or fingerprint. 都是独一无二的 就像一个人的签名或指纹一样
Michelle Kuehner is an experienced examiner at the Pittsburgh firearms unit. Michelle Kuehner是匹兹堡警察局轻武器组 的资深警员
Her team fires every gun seized by the police into a water tank. 她的团队用每把枪向水箱射击 这些枪来自于犯罪现场
And examines the bullets. 然后检查子弹
She places two bullets onto a special microscope 她将两颗子弹放在特制的显微镜上
called a comparison microscope for close-up inspection. 也就是“对比显微镜”，能从细微处进行检查
These are actually 2 microscopes,' 2 lenses 这实际上是两个显微镜，两个镜头
so that allows us to look at 2 images and manipulate them separately 这就使我们可以看到两个画面 并对它们进行单独处理
but look at them side by side. 看到它们是并排的
The technology hasn't changed much since the 1920s 这项技术从1920年代到现在基本没变化
when firearms examiners started using comparison microscopes. 当时武器检查员就已经开始使用对比显微镜
Here you see one bullet under the microscope 现在从显微镜看到了一颗子弹
Increasing the magnification reveals the striations or scratches 放大，看到了撞针痕迹和摩擦痕迹
- the individual marks that ID a bullet. 这就是区别子弹的唯一标志
By moving the dividing line Kuehner can examine both bullets 通过移动刻度线Kuehner可以查看两个子弹
- this is not a match. 这两个不匹配
But when she rotates the bullet, the two patterns fall into place. 当她旋转子弹时， 两个图案就依序排列
Now it's a match. 现在它们是匹配的
But sometimes police only recover a small bullet fragment at the scene, 但有时警察只能在事发现场找到子弹碎片
or from the victim's body. 或者在受害人的身上
Even then she can still make a match. 即使这样，她也能进行匹配检验
You can have it as small as, you know, the width of a pinhead 即使象撞针这么小宽度的尺寸
there's a potential that you can make an identification from that 也是有可能作出检验判断的
In the past decade, technology has created automated bullet matching workstations 在过去的十年中 随着科技进步已经出现了子弹自动匹配工作平台
that meld traditional comparison microscopes with high powered computers. 这项技术融合了传统的对比显微镜和高性能计算机
The result is IBIS, a system that can help solve crimes by choosing potential matches 结果就是IBIS系统 这个系统通过选择潜在的匹配弹来帮助破案
not in days but in seconds. 不需要花几天，只需要几秒钟
But so far technology hasn't been able to completely replace 但目前为止，
the experienced eye of a forensic examiner. 这项技术还不能完全取代一个经验丰富检查人员
Still it takes that examiner to make the final call…it takes lots of practice 仍然需要检查人员作最终结论 检查人员经历过多次的实践
lots of looking at things that don't match 观察过许多不匹配的子弹
and just sitting there hours at the microscope…and sore eyes… 坐在显微镜前几个小事 连眼睛都看痛了
Looking to the future we find guns that shoot around corners 考虑到未来能绕过障碍进行射击的枪
and a system that can fire a staggering 1 million rounds per minute 和一个系统 它能每分钟发射1百万发子弹
And a smart bullet that can steer itself in flight and hit its target every time 一种智能弹，它能自主导航 每次都能精确击中目标
This is the next-generation infantry weapon - The XM8 这就是下一代的步兵武器－－XM8
It's the new assault rifle for the US Army. 这是美军的新式突击步枪
It fires the 556 calibre bullet, the same as the M16 assault rifle it replaced 使用556口径弹 和M16突击步枪一样的子弹
But it has been designed for many different roles. 但它被设计成多种用途
It fires 10, 30 or 100 round magazines, 每个弹夹装有10、30或100发子弹
Fit it with a grenade launcher and it upgrades to 40mm rounds 如果加装榴弹发射器那就可以升级使用40mm弹
The rifle built of polymer, is 20% lighter than existing weapons. 这种步枪由聚合物制成 比现有武器轻20%
It is extremely reliable. 性能高度可靠
Bury it in sand or drop it in water, and you can still fire it. 在沙子里和水下照样能射击
It's the weapon of war for the 21st century 这是21世纪的战争武器
One thing it can't do is fire around corners. 但有一点：子弹不会绕开障碍物
But... this gun does exactly that. 但是，这种可以
This is the only weapon allowing the shooter to stay safe around a corner 它是唯一的可以让射手躲在角落里安全射击的枪
and out of sight of a target, 即使你看不到目标
The gun swivels in the middle, 枪的中部可以旋转
enabling the gun to see and fire with no risk to the shooter. 可以让射手安全的标准并射击
The pistol and a video camera are at the front, 枪的前部装有发射装置和摄像机
while a screen at the back of the gun, 而后面则是显示屏
lets the user see what's lurking around the corner. 射手可以看到角落外面的潜伏物
The gun barrel camera can focus on targets up to 400 yards away 枪管上的摄像机可以锁定400码远的目标
and can be used with any military pistol, M16 rifle or tear gas launcher. 可以使用任何军用枪械 M16步枪或催泪弹发射器
The round-the-corner gun will keep you out of the line of fire 这种无障碍枪可以让你不在射击方向上
but sometimes you need the shock and awe that only comes from overwhelming firepower 但有时需要压倒性的火力 来震慑对方
The fastest weapon today gives you just that. 目前射速最快的武器可以做到这一点
the mechanical Gatling guns fires 6,000 rounds per minute. 格林机关枪每分钟发射6000发子弹
That's ten times the rate of infantry rifles on full automatic. 这是全自动突击步枪射速的10倍
But the future offers far faster rates-of-fire. 但是未来的枪射速将会更快
A new ballistic technology capable of firing one million rounds per minute 一种新的弹道技术可以使射速达到每分钟1百万发
The Australian company Metal Storm has developed the world's first electronic gun 澳大利亚的“金属风暴”公司开发了一种世界上 射速最快的电子枪
that can fire an astonishing 16,000 rounds a second 射速可达到惊人的16000发每秒
Its has the firepower to shred a truck in a blink of an eye 它的火力可以在眨眼间将一辆卡车炸成碎片
or throw up a defensive wall of lead against an incoming missile 或形成一面“铅的防护墙” 拦截来袭的导弹
Unlike a normal weapons system 和通常的武器系统不同
the firing mechanism has no moving parts and no cartridges 它的击发构件没有活动部件， 也没有弹夹
Instead, it fires the bullets with electrical impulses 取而代之的是电子脉冲
The firing pod consists of multiple barrels preloaded with bullets 它的发射集群有数个预装弹药枪膛组成
that can be of small caliber. 这些口径都很小
It fires bullets either one by one, 和电子脉冲同时，它可以一个一个地发射
in simultaneous waves - or in one instantaneous burst. 也可以一次齐射
It's a system designed for multi-use, on land 这种系统可以用于多种地方
or in the air. 陆战或空战
It can be programmed to attack one target or multiple targets. 它可以由程序控制攻击一个或多个目标
The on board computer using radar and GPS 它的集成电脑使用雷达或GPS
tracks the landscape for the target - with pinpoint accuracy. 追踪地形目标 精度相当高
If this is the weapons system of the future 如果这是未来的武器系统的话
What's the next generation bullet? 那什么是未来的子弹的？
Since its early days the bullet has been a hunk of lead 子弹从一开始就一直是铅弹
relying more on the skill of the shooter to hit its target. 更多的依赖射手的操作来击中目标
But this ammo could change everything. 但这种子弹可以改变这种状况
Its a smart bullet, and could make all other bullets obsolete 也就是只能子弹 有了它，其他子弹就可以作废了
Although still at the research stage, 虽然仍处于研究阶段
it will steer itself in flight, like a miniature cruise missile. 它可以自主导航 就像小型的巡航导弹
Hitting its target every time. 百发百中
The basic philosophy behind the guided munitions is to save human lives. 导航武器背后的哲学基础就是为了挽救人的生命
Aerospace engineer Ron Barrett has spent 15 years developing the smart bullet. 航空工程师Ron Barrett已经花了15年来研究这种自能子弹
Smart bullet technology is intended to hit targets 智能子弹技术定义为
at typically extended ranges with a great deal of accuracy 在很远的射程中能精确击中目标的技术
- one shot one kill 百发百中
A laser guides the bullet towards the target 子弹使用激光导航
if the target moves as the bullet is being fired 如果子弹发射时目标物移动了
then the laser beam can track the target 激光束可以追踪目标
Even over short range the bullet can adjust its flight to hit a moving target. 即使在很短的距离 子弹也能调整它的飞行轨迹击中运动目标
This type of bullet has moveable fins in the back 这种子弹在后部装有可移动翼
and these types of fins guide the bullet. 这种翼可以调整子弹的飞行
The fins work like an airplane's rudder, 其工作原理就像飞机的方向舵
constantly correcting the trajectory. 不停地调整子弹的飞行轨迹
Smart bullets can even shoot down other bullets 只能子弹甚至可以打掉其他子弹
This bullet is an anti-bullet-bullet. 这就是“反子弹”子弹
Designed to shoot down incoming enemy rounds. 专门射击来袭的敌方子弹
In the nose of the bullet there is a small charge 在子弹头部装有少量弹药
and this charge is so powerful that it can actually stop the entire bullet in flight 这些弹药能量很高 足以使整个子弹停止飞行
Radar spots and tracks incoming hostile rounds 雷达定位并追踪来袭敌方子弹
The computer sends a signal to the launcher pod, 计算机向发射集群传送指令
firing smart bullets to intercept the speeding target. 发射智能弹拦截高速飞行的目标物
The counter munitions is fired 发射拦截弹
and as the counter munitions get very close to the hostile munitions, 拦截弹接近敌方子弹
its detonated and it causes the hostile munitions to tumble out of control 自我引爆 使敌方子弹翻转失去控制
it's very much a David and Goliath type of scene. 这很像大卫和格莱斯的魔术表演
Most of the targets that this type of round is intended to engage are other types of bullets, 用这种子弹拦截的大部分目标都是其它类型的子弹
coming from machine guns and AK 47s or rocket propelled grenade or mortars. 比如机枪或AK47地子弹 还有火箭推进的榴弹或迫击炮弹
This system can protect a Humvee or even a town. 这种武器系统可以保护一辆军用悍马甚至一座城镇
The basic concept of this type of counter munitions system is to create an umbrella of safety 这种拦截系统的基本理念 就是要成为一具保护伞
and the umbrella of safety could protect a civilian population 保护平民的保护伞
it could protect law enforcement agents, peacekeepers or friendly soldiers. 也可以保护执法人员、维和人员或友军
For centuries, bullets have been designed to kill people. 几个世纪以来 子弹的设计都是用来杀人的
From simple lead balls; to the full metal jacket; 从最简单的铅弹 到全金属外壳的圆头子弹
to the deadly stopping power of the Ranger Talon. 再到令人生畏的“游侠爪”
But now, comes a bullet designed to kill bullets 但现在 设计的子弹是为了阻止子弹
A bullet designed to save lives. 是为了拯救生命
If smart bullet technology is proved to work 如果智能子弹确实能派上用途
- it could be the answer to our question. 那也就回答了我们的问题
This could be the ultimate bullet. 这才是真正的“终极子弹”
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