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
Learning any language takes a lot of effort.
学习任何语言都需要花费很多努力。
She was disappointed by what Lawrence said.
她对劳伦斯说的话感到失望。
Yes, it certainly is.
是呀，确实如此。