Fcv
abbr. fill-and-check valve 注入与检查阀门
🗣️ 情景例句
Yes, of course.
可以，当然可以。
Everything must have a beginning.
凡是都有起源。
Justice had been done even before the man was handed over to the police.
甚至在那人还没被送交给警察之前，正义就已得到了伸张。