echo depth sounding sonar

例句：

1. 1. The echo of the waves on the shore was soothing.
   海浪拍打岸边的声音很宁静。
2. 2. The echo of her laughter reverberated through the room.
   她笑声的回音在房间里回荡。
3. 3. The sound of a car engine echoed through the empty streets.
   汽车引擎声在空荡的街道上回响。