Ef
abbr. 每面（each face）；超精度（extremely fine）；仰角指示器（Elevation Finder）
🗣️ 情景例句
My wife and I spent our honeymoon at the inn.
我太太和我在你们旅馆度的蜜月。
Does it make any difference to you whether we have our lesson at two o'clock or at three o'clock?
我们在两点上课还是在三点上课，你觉得有关系吗？
I can't afford that.
我买不起。