Rcd
abbr. 剩余電流裝置（residual current device）；路由控制數字（Route Control Digit）；接收機載波檢測器（Receiver Carrier Detector）
??? 情景例句
I'd like that.
我很樂意。
Is there any discount for the USA Railpass?
火車通行證有折扣嗎？
We need it in our office by next Monday.
下星期一以前要送到我們公司。