c. 1200, past participle adjective from close (v.). Closed circuit is attested from 1827; closed shop in union sense from 1904; closed system first recorded 1896 in William James.
权威例句
1. He closed down the business and went into politics.
他关闭公司投身政治。
2. It'd be better for a place like this to remain closed.
像这种地方最好一直关闭。
3. He closed his door and started the quarter-mile walk down the hill.
他关上门,踏上了1/4英里长的下山路.
4. She slipped into the driving seat and closed the door.
她溜进了驾驶座,关上了门。
5. I've quite forgotten how closed in London can seem.