normal breathing sound

例句：

1. 1. The normal temperature is 36.5 degrees Celsius.
   正常温度是36.5摄氏度。
2. 2. She has a normal voice and speaks clearly.
   她的声音正常，说话清晰。
3. 3.The room was in normal condition after the fire.
   火灾后房间处于正常状态。