Valvulae
[医] 瓣, 瓣膜
🗣️ 情景例句
I have the whole summer ...
我有一整个暑假可以利用……
Wise men learn by other men's mistakes;fools by their own.
聪明人从旁人的错误中吸取教训，愚笨人则从自身的错误中吸取教训。
At the age of eight, he joined a group of child dancers.
8岁时参加了儿童舞蹈团。