Parodontitis
牙周炎
🗣️ 情景例句
Is it all right if I use a letter of credit?
如果我使用信用证，没关系吧？
It seems to be clearing up.
看来天要放晴了。
Train compartments soon get cramped and stuffy.
车厢很快就变得拥挤、闷热，