| 单词 | under cover |
| 释义 | ● under ˈcover pretending to be sb else in order to do sth secretly （为秘密活动）伪装着，装扮着，冒名顶替◆ a police officer working under cover 做隐蔽工作的警察under a structure that gives protection from the weather 在…下（避风雨）See also cover |
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