The spy conducted a covert operation in the enemy territory.
间谍在敌方领土上进行了一项秘密行动。
They held a covert meeting to discuss the sensitive issue.
他们举行了一次秘密会议来讨论敏感问题。
The organization was involved in a covert mission overseas.
该组织参与了一项海外秘密任务。
He used a covert method to gather information.
他使用了一种秘密的方法来收集信息。
Their covert activities were discovered by the authorities.
他们的秘密活动被当局发现了。
The agent was trained in covert operations and tactics.
这名特工接受了秘密行动和战术的训练。
The plan was executed in a covert manner to avoid detection.
计划以秘密方式执行以避免被发现。
They communicated through covert signals to maintain secrecy.
他们通过秘密信号进行交流以保持保密。
The covert surveillance lasted for several weeks.
这次秘密监视持续了几个星期。
The investigation revealed a network of covert operatives.
调查揭示了一个秘密行动人员的网络。
covert mission 隐秘任务
covert surveillance 秘密监视
covert activities 秘密活动
covert tactics 隐秘战术
covert intelligence 秘密情报
covert agenda 隐秘议程
复数: coverts;
副词: covertly;
