sound shadow region

例句：

1. 1. The sound of the waves crashing against the shore is soothing.
   海浪拍打岸边的声音令人感到宁静。
2. 2. She listened to the sound of the raindrops falling on the roof.
   她听着雨滴打在屋顶上的声音。
3. 3. The sound of laughter filled the room.
   房间里充满了笑声。