covert operation
collocation秘密行动；隐蔽行动
The soldiers were sent on a covert operation behind enemy lines.
士兵们被派往敌后执行秘密行动。
隐秘的；隐蔽的；秘密的
先理解核心含义，再看它在真实句子里的用法。
隐秘的；隐蔽的；秘密的
secret or hidden; not openly shown or practiced
The agency conducted a covert operation to gather intelligence.
该机构进行了一次秘密行动以收集情报。
秘密的,偷偷摸摸的,隐藏的
Secret, surreptitious, concealed.
秘密的或隐藏的；不公开进行或展示的
secret or hidden; not openly practiced or engaged in or shown or avowed
She gave him a covert glance when the teacher wasn't looking.
趁老师不注意，她偷偷地瞥了他一眼。
AI contextual example
The company's covert surveillance of employees raised privacy concerns.
公司对员工进行的秘密监视引发了隐私担忧。
AI contextual example
covert actions by the CIA
中央情报局的秘密行动。
WordNet
covert funding for the rebels
对叛乱分子的秘密资助。
WordNet
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秘密行动；隐蔽行动
The soldiers were sent on a covert operation behind enemy lines.
士兵们被派往敌后执行秘密行动。
秘密监视
Police kept the suspect under covert surveillance for weeks.
警方对嫌疑人进行了数周的秘密监视。
秘密特工；卧底
She worked as a covert agent for the intelligence agency.
她为情报机构担任秘密特工。
隐秘的方式；偷偷摸摸
He left the building in a covert manner to avoid being seen.
他偷偷摸摸地离开大楼，以免被人看见。
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记忆联想：把 covert 看成 cover + t，像被盖子（cover）盖住，所以是‘隐蔽的、秘密的’。
语域：formal 常见场景：军事行动、警方调查、文学描写 covert 是较正式的书面用词，多用于军事、情报或警方调查等需要隐蔽进行的语境；在非正式场合，secret 或 hidden 会更常见。
通常作定语或表语，后接about表示对...保密。
Dictionary facts from ECDICT, WIKTIONARY.