under covera) pretending to be someone else in order to do something secretly 〔冒充别人〕伪装着,隐匿地,暗地里 She was working under cover to get information on drug gangs. 她从事卧底工作,搜集贩毒团伙的情报。
b) under a roof or other structure 在〔屋顶等结构的〕遮蔽下 The aircraft is displayed under cover in the USAF Gallery. 这架飞机在美国空军陈列室内展出。
under cover• an undercover cop• Cobb worked on the case under cover for the FBI.
→ under cover at cover2(2)