He was complaining of pain in his scrotum.

This organism is classified into the subphylum.

A baby's fontanelle closes a few months after birth.

A baby's fontanelle naturally closes a few months after birth.

In female anatomy, the labia occupy an important part.

I am planning to go to Xiamen next week.

I am planning to go to Amoy next week.

He injured his perineum in a bicycle accident.

He was studying ancient documents and found the character '黃門'.

He sneaked into the school through the back gate.