kuò / yuē / jī / néng / gòu / bāng / zhù / shēn / tǐ / kòng / zhì / mǒu / xiē / tōng / dào / de / kāi / hé

括约肌能够帮助身体控制某些通道的开合。

Sphincters help the body control the opening and closing of certain passages.