undercover
adj. 暗中進行的,秘密的; 秘密從事的; 私下的,隱蔽的; 從事間諜活動的
Undercover work involves secretly obtaining information for the government or the police.
...an undercover operation designed to catch drug smugglers.
抓捕毒販的秘密行動
...undercover FBI agents.
聯邦調查局的密探
1. conducted with or marked by hidden aims or methods;
The undercover agent immediately sourced the police when he found out the gangs'meeting place.
臥底的特工發現黑幫的見面地點後立刻通知了警方.
He was working undercover for the police inside the gang.
他是警方在黑幫的臥底.
She worked as an undercover agent for the police.
她為警察當密探.
So from then on they switched over completely to undercover activities.
所以,以後他們就完全轉入秘密了.
So, do you always do this undercover thing?
你一直都是做這種臥底的工作 嗎 ?