adv.偷偷摸摸地

The agent operated covertly in enemy territory for months.
该特工在敌方领土秘密行动了数月。
The government is accused of conducting a covert surveillance operation.
政府被指控进行了秘密监视行动。
They communicate with their supporters through a network of covert channels.
他们通过一系列秘密渠道与支持者沟通。
She managed to enter the restricted area under the guise of a maintenance worker.
她伪装成维修工人成功进入了限制区域。
The company is alleged to have engaged in covert price fixing.
该公司被指控参与了秘密的价格操纵。
The spy's cover was blown when his true identity was revealed.
间谍的真实身份曝光后，他的伪装被揭穿。
Covert operations often involve deniable actions by intelligence agencies.
秘密行动通常涉及情报机构不可否认的行为。
The charity organization had to operate covertly in some countries due to political unrest.
由于政治动荡，这家慈善组织在一些国家不得不秘密运作。
The hacker infiltrated the system without leaving any overt traces.
黑客潜入系统，没有留下任何明显的痕迹。
The diplomat's role in the peace talks was initially kept covert.
外交官在和平谈判中的角色最初是保密的。