Perdontoclasia
[醫] 牙周潰壞
??? 情景例句
We need to find time to be together more,
我們確實需要多找時間相聚一起
I invited him to come in, but he wouldn't.
我請他進來，但是他不肯。
It was the middle of winter.
此時正值隆冬季節，