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
Tom doesn't enjoy going to school.
汤姆不喜欢上学。
That's OK.
没关系。
I want to take some books to the classroom. Could you help me, please?
我想把一些书拿到教室里，你能帮个忙吗？