Ef
abbr. 每面（each face）；超精度（extremely fine）；仰角指示器（Elevation Finder）
🗣️ 情景例句
He made an impressive speech.
他发表了一篇感人的演讲。
I was just about to call you.
我正准备打电话给你。
Is there anything I can do for you?
我能为你做点什么吗？