Periaementitis
牙周膜炎
🗣️ 情景例句
She's an easy-going teacher.
她是位随和的老师。
It is an equal failing to trust everybody,and to trust nobody.
信任一切与不信任任何人，同样是弱点。
The explanation was simple but very unusual.
解释很简单，却异乎寻常。