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
You are in great condition. I can't believe it!
你的身体太好啦。我简直不敢相信。
It takes a bit of nerve to cross these chain bridges.
过这种铁锁桥需要有点胆量才行。
How's it going?
怎么样？