expiratory center

例句：

1. 1.The patient's breathing center is located in the chest.
   患者的呼吸中心位于胸部。
2. 2. The doctor advised him to take deep breaths and slow his breathing rate.
   医生建议他深呼吸并减慢呼吸速率。
3. 3. During sleep, the body's respiratory center becomes less active.
   在睡眠时，身体的呼吸中枢变得不那么活跃。