Retropulpitis
逆行性牙髓炎
🗣️ 情景例句
If you go camping, at night you'll hear all the nocturnal animals.
如果你去野营，晚上可以听到动物的夜歌。
He's a teather.
他是教师。
Er, is it under that window?
是在窗户下面吗？