Peridural
[医] 硬膜外的
🗣️ 情景例句
who used to run the drugstore in town.
他过去在镇上经营药房。
It's no big deal.
这没什么大不了的。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，