Cemf
abbr. 反电动势（Counter Electromotive Force）
🗣️ 情景例句
Lots of people are tired of higher taxes.
许多人对于增税很厌烦。
His classical music is so quiet. I can't even hear it!
他的古典音乐幽静得听不见。
You are kidding.
你开玩笑吧。