vaginal sphincter

例句：

1. 1.The vaginal sphincter is a crucial part of the female reproductive system.
   阴道括约肌是女性生殖系统的重要组成部分。
2. 2.During childbirth, the vaginal sphincter helps to prevent the baby from coming out too quickly.
   分娩过程中，阴道括约肌有助于防止婴儿过早出生。
3. 3. In women with weakened vaginal sphincters, sexual intercourse can be painful and uncomfortable.
   对于阴道括约肌功能较弱的女性来说，性交可能会感到疼痛和不适。