Closed circuit operation
[建] 通路操作
🧩 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
🗣️ 情景例句
What did I tell you?
我不是告诉过你吗？
Do you have a book?
你有一本书吗？
In this way, he has begun his own private 'telephone' service.
就这样，他开始自己的私人“电话”业务。