sound coefficient

例句：

1. 1. The sound of the waves crashing against the shore is soothing.
   海浪拍打岸边的声音很舒缓。
2. 2. She sang beautifully, filling the room with her sweet voice.
   她唱得非常好，用她甜美的声音充满了整个房间。
3. 3. The music had a hauntingly beautiful sound that made me feel nostalgic.
   音乐有一种令人怀念的美妙声音，让我感到怀旧。