回声

• His footsteps echoed ( in the empty hall )
  他的脚步声（在空荡荡的大堂里）产生了回声
• Echoes of cries of pain reverberate my heart
  痛苦喊叫的回声在我心中回荡。
• A duck ' s quack doesn ' t echo , and no one knows why
  鸭子的叫声没有回声，此迷无人能解。
• The hills echoed to the sound of their laughter
  他们的笑声在山中产生回声
• A duck ' s quack doesn ' t echo , and no oneknows why
  鸭子的叫声没有回声，此谜无人能解。
• [ gunshot echoes , horse neighs in distance ]
  [枪声的回声,远处的马嘶声]
• His voice echoed in the big empty hall
  他的声音在空荡的大厅里发出回声。
• The echo mocks her origin to prove she is the original
  回声模仿原声，以证明她是原声。
• General specification for echo - sounding equipment in ships
  船用回声测深设备通用技术条件
• What the hell is that ? - echolocation
  到底是什么东西？ -是回声定位法