adj. 暗中进行的,秘密的;秘密从事的;私下的,隐蔽的;从事间谍活动的
n. 卧底
网络 卧底; 高桥盾; 秘密的
Officers had tailed the gang during a major undercover operation.
警方在一次重大的秘密行动中跟踪过这个团伙。
Journalists informed police who planted an undercover detective to trap Smith.
记者们向警方提供了信息,警方安插了一名卧底侦探诱捕史密斯。
Swanson persuaded Hubley to work undercover to capture the killer.
斯旺森说服了赫布利秘密工作以捕获凶手。
The illegal payments were discovered by a journalist working undercover.
这些非法付款是一位暗中查访的新闻记者发现的。
So I decided to go undercover to collect it, "he said."
所以,我就决定当卧底来收集证据了。