Orthodentin
[医] 直型牙本质, 正牙质
🗣️ 情景例句
He's running for the school board.
他正在竞选联合校董会董事。
I know the boy whose father is a guide.
我知道那个男孩的父亲是导游。
Do you speak Chinese?
你会讲汉语吗？