Ball's valves
[医] 鲍尔氏瓣, 莫尔加尼氏瓣(肛瓣)
🧩 词语组成解析
n. 阀门；真空管；瓣膜（valve的复数）
🗣️ 情景例句
to plan the refurnishing of the old library
计划重新整修老图书馆
Forgive me for interrupting, but I have a question.
对不起我插个嘴，我有一个问题。
No, they're from America.
不，是美国的。