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
We'll set up our tents over there by the edge of the woods.
我们在林边搭帐蓬。
Why are you yelling?
你在嚷什么？
Every year, several classes visit the factory.
每年都有好几个班去参观这家工厂。