Retropulpitis
逆行性牙髓炎
🗣️ 情景例句
I can't figure out why he quit his job.
我不能理解他为什么要辞职。
Yes. And while I think of it, please ask when you want to borrow my records/CDs.
是的。还有，随便想起一件事，要是你想借用我的唱片，请先问一声。
The line's busy. I'll try again later.
电话占线，过一会我再打。