Fcv
abbr. fill-and-check valve 注入与检查阀门
🗣️ 情景例句
She said she'll call back?
她说过她会打电话回来？
A work ill done must be twice done.
未做好的活，需要重新做。
After the party. Ann feels very happy.
聚会之后，安感到非常愉快。