Pericementitis
[医] 牙周膜炎
🗣️ 情景例句
I'd like to be a member.
我想加入做为会员。
You can't please everyone.
你不可能讨好每一个人。
No two sorts of birds practise quite the same sort of flight;
没有任何两种鸟的飞行方式是相同的。