Mercier's valves
[医] 梅尔西埃氏瓣(输尿管襞)
🧩 词语组成解析
n. 阀门；真空管；瓣膜（valve的复数）
🗣️ 情景例句
What do you want to do after breakfast?
早餐后你想做什么？
Have but few friends though many acquaintances.
朋友要少，熟人要多。
The first settlers on the plains of America were Native Americans.
美洲平原上的首批定居者是美洲土著人。