Rcd
abbr. 剩余电流装置（residual current device）；路由控制数字（Route Control Digit）；接收机载波检测器（Receiver Carrier Detector）
🗣️ 情景例句
I don't know.
我不知道。
A fool can ask more questions than seven wise men can answer.
一愚发问，七智结舌。
He could not find his fifty pence piece anywhere, and what is more,
但他摸了半天也没找到那50便士硬币，