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
We have to advance the building of the new school.
我们必须促进新学校的建设。
That's the way it is.
事情就是这样。
I was very glad when the boys won the relay race.
我非常高兴，男同学在接力赛中获胜。