adj.秘密的，隐蔽的，暗中的
n.(动物可藏身的)矮树丛，灌木林

原形：covert复数：coverts

The agent worked covertly to gather intelligence on the enemy's plans.
特工秘密地工作以收集敌人计划的情报。
The government launched a covert operation to rescue the hostages.
政府发起了一项秘密行动以营救人质。
She wore a covert smile, hinting at some private joke.
她带着隐秘的微笑，暗示着某个私人的笑话。
The journalist went undercover to expose the corrupt practices within the company.
记者秘密潜入以揭露公司内部的腐败行为。
His covert support for the opposition was eventually discovered.
他对反对派的秘密支持最终被发现。
The security agency conducted covert surveillance on suspected terrorists.
安全机构对疑似恐怖分子进行了秘密监视。
He kept his true identity covert to protect himself from danger.
他隐瞒自己的真实身份以保护自己免受危险。
The book reveals several covert operations conducted during the Cold War.
这本书揭示了冷战期间进行的几项秘密行动。
A covert network of informants helped police uncover the criminal ring.
一个秘密线人网络帮助警方揭露了犯罪团伙。
The celebrity tried to keep her relationship status covert to maintain privacy.
这位名人试图保密她的恋爱状况以保持隐私。