Periaementitis
牙周膜炎
🗣️ 情景例句
I know. I heard you talking about it
我知道。我听到你们谈论的那件事了，
Who will accompany you to the airport?
谁将陪你去机场？
Where does Bill sit in the classrooom?
比尔坐在教室的那块儿？