Closed circuit signalling
[计] 闭路通信
🧩 词语组成解析
closed
[klozd]
adj. 关闭着的，封闭着的;密闭着的，保密的;<美>准备好了的，定了契约的;
v. “close”的过去式和过去分词;
clos=close关闭+ed已...的→关闭了的
[计] 信号传输法
🗣️ 情景例句
After he eats!
等他吃饱了！
I went to see a friend of mine.
我去看了一个朋友。
After her husband had gone to work.
理查兹夫人等丈夫上班走后，