undercoveradj.从事秘密工作的;秘密的
undercover payments贿赂(暗中给的钱)
undercover operation秘密行动
Undercover operatives有某种(尤指狡滑的)行为的人
undercover activities卧底侦查
undercover policewomen便衣女警
Undercover FBI agents.从事秘密调查的联邦调查局密探
undercover investigation卧底侦查
undercover work as a spy当间谍的秘密工作
undercover police officer卧底警务人员
undercover narcotics agent非法麻醉剂, 非法毒品贩