Peridentitis
[医] 牙周炎
🗣️ 情景例句
We have 5 international patents which we are ready to sell.
我们有五项国际专利可以出售。
A boisterous horse must have a rough bridle.
烈马要套粗笼头。
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。