Sphincter
n. 括约肌\\n[医] 括约肌
📖 牛津释义
sphincter
n
(fml 文) ring of muscle that surrounds an opening in the body and can contract to close it 括约肌
the anal sphincter 肛门括约肌.
🗣️ 情景例句
Mr. Levine, Susan Stewart.
Levine先生， 我是Susan Stewart。
A present!
有礼物！
because balloons can be a great danger to aircraft.
因为气球有可能给飞机造成极大的危险。