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
He ventured to speak to her.
他鼓起勇气向她说话。
And our successful techniques, and to speak about our failures.
和成功技巧，并讲出我们的失败之处。
It is about two hundred metres from his home.
汽车站离他家二百米左右。