Cemf
abbr. 反电动势（Counter Electromotive Force）
🗣️ 情景例句
I tried to teach my kids the importance of independence,
我总是告诫孩子们独立的重要。
How do you do?
你好！
By then, however, in many places the grass had already taken root.
然而到那时，很多地方的草已经生了根。