Peridontia
(=periodontia)牙周病學
?? 擴展釋義
【醫】 牙周病學
??? 情景例句
It's a great college.
那是一所好大學。
Obedience is the first duty of a soldier.
服從是軍人的第一職責。
The sandwiches were on the plates, and the candles were on the cake. Ann felt very happy.
三明治在碟子里，蠟燭插在蛋糕上。安覺得很愉快。