P.u.o.
[医] 未知热(发热原因不明)
🗣️ 情景例句
The costs of college get higher every year.
学费逐年增加，越来越贵。
He is a fool who cannot be angry,but he is a wise man who will not.
不会发怒是蠢人，不愿发怒是聪明人。
I'm not sure how this works.
我不懂这是如何操作的。