vagina musculi recti abdodminis

例句：

1. 1. The vagina is the organ that connects the uterus to the outside world.
   阴道是连接子宫和外界的器官。
2. 2.During childbirth, the vagina stretches and dilates to allow the baby to pass through.
   分娩期间，阴道会拉伸并扩张以允许婴儿通过。
3. 3. Vaginal discharge is normal during menstruation and can be a sign of infection or inflammation.
   月经期间阴道分泌物是正常的，可能是感染或炎症的迹象。