Efs
(ef 的复数) abbr. 每面（each face）；超精度（extremely fine）；仰角指示器（Elevation Finder）
🗣️ 情景例句
Thank you so much for coming. Have a safe drive home.
谢谢你的光临。小心驾车回家。
I can't say for certain off-hand.
我还不能马上说定。
Then you'll see the sign for the rest rooms.
你就可以看到厕所的牌子了。