来自《犯罪现场调查 第12季 第18集 第18集》

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  They were using blanks.
  他们用的是空弹
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  No projectile,
  没有弹头
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  but you get the same amount of force
  但还是能达到和时速
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  as your everyday 400- meter-per-second bullet.
  一秒四百米的子弹同样的冲力
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  Now, that force usually comes out
  一般来说这股冲力从枪口
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  in the form of a loud but harmless muzzle flash.
  蹦出只会产生一声巨响和无杀伤力的枪火
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  Unless the barrel is obstructed...
  除非枪口被一颗纽扣
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  by a button.
  给挡住了
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  Fire in the hole!
  注意 开枪了
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  Projectile by proxy.
  纽扣代替了弹头
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  Okay, so we have the "How,"
  好了 手法我们是知道了
• 
  
  now we need the "Who."
  现在只剩凶手未知