Fcv
abbr. fill-and-check valve 注入与检查阀门
🗣️ 情景例句
What are you up to?
你在忙些什么？
How did you break your leg?
你怎么弄断了腿？
The city dweller never experiences anxieties of this sort.
这种焦虑，城里人是从未体验过的。