1. echo sounder
   回声测深器，回声测深仪，回声探测器，回音测深仪
   

1. The sound of the doorbell awoke the baby.
   门铃声把婴儿吵醒了。
2. To flow or ripple with a murmuring sound.
   潺潺地流流动或滴落并且带有潺潺的声音
3. The sound of a bell knelling;a toll.
   鸣钟通报缓慢而庄严地鸣钟的声音;鸣钟通报
4. The two crews now tensely awaited the sound of gun.
   两只赛艇的队员在紧张地等待着发令枪声。
5. “pi pi pa pa”—crackiling sound of a burning log, etc.
   噼噼啪啪

　1个名词解释