来自《犯罪现场调查 第13季 第21集 第21集》

• 
  
  Now, right there, just before the laughter,
  在笑声开始之前
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  there's a high-frequency hiss, almost,
  高频的嘶嘶声出现
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  and then it dies out immediately after.
  笑声结束后 又马上消失了
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  What is it?
  这是什么
• 
  
  Well, it's got to be the speaker on whatever device is playing.
  一定是某种设备的扬声器
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  It powers up just a fraction of a second
  在笑声出现前
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  before the sound comes out.
  一瞬间启动
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  So the killer played a recording of children laughing
  所以凶手杀人后
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  just after the murder?
  还播放小孩笑声的录音
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  That might be even sicker.
  这更变态
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  Hey, just finished DNA analysis on the toys.
  我刚完成了对玩具上DNA的分析
• 
  
  And?
  然后呢