sound ranging observation post

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 sang a beautiful song that made everyone smile.
   她唱了一首美丽的歌曲，让每个人都笑了。
3. 3. The sound of the wind in the trees is so calming.
   风吹过树梢的声音如此平静。