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
Where can I find the information desk?
咨询台在哪儿？
One false step will make a great difference.
失之毫厘，谬以千里。
His great flight lasted thirty-seven minutes.
他这次伟大的飞行持续37分钟。