Hyrtl's sphincter

例句：

1. 1. The hyrtl's sphincter is responsible for controlling the flow of urine and feces.
   赫特尔氏括约肌负责控制尿液和粪便的流动。
2. 2. The doctor advised him to relax his hyrtl's sphincter to relieve the pain.
   医生建议他放松赫特尔氏括约肌以缓解疼痛。
3. 3. During childbirth, the hyrtl's sphincter can become weak and need to be strengthened.
   分娩期间，赫特尔氏括约肌可能会变弱，需要加强。