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closed circuit [英] [kləʊzd ˈsɜ:kɪt] [美] [klozd ˈsɚkɪt] [短语] 闭合电路 词频排名 22905/55435 学习人数 118 难度等级 1/10 认知比例 56.82% 例句 Closed circuit TV cameras have been installed in the laboratories. 实验室里安装了闭路电视。 助记 联想 closed 关着的,关闭的,封闭的。circuit 电路,线路,回路。closed circuit 闭合回路,Closed Circuit Television 闭路电视
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