sound intermediate

例句：

1. 1. The sound of the waves crashing against the shore is soothing to the ears.
   海浪拍打岸边的声音令人心旷神怡。
2. 2. The teacher asked us to raise our hands and answer the questions.
   老师让我们举手回答问题。
3. 3. The sound of laughter echoed through the room.
   笑声在房间里回荡。