Pericemental gingivitis
[医] 牙骨质周龈炎
🧩 词语组成解析
[医] 牙周膜的
n. 齿龈炎
🗣️ 情景例句
There we go ... will make twenty. Thanks.
你看……加起来正好二十美元。谢谢了。
I usually feel timid in the presence of very bright people.
站在聪明人面前，我感到羞怯。
I'm very sorry. I borrowed a book from the library two weeks ago.
“很对不起。两周前我从图书馆借了一本书。