Fcv
abbr. fill-and-check valve 注入与检查阀门
🗣️ 情景例句
Betty, you had it, but you didn't say it.
Betty你知道答案， 但是你没有说出来。
He yanked out my ladder.
他使劲地拉了我的梯子。
So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
从测定海深到测定鱼群，这一进展比较容易。