adj.秘密的，暗中从事的，保密的

They held a clandestine meeting in the abandoned warehouse to discuss their plans.
他们在废弃仓库里秘密会面，讨论他们的计划。
The agent conducted a series of clandestine operations to infiltrate the criminal organization.
该特工进行了一系列秘密行动以打入犯罪组织内部。
Their love affair was clandestine, hidden from disapproving eyes of their families.
他们的恋情是秘密的，瞒着家人不赞同的目光。
The journalist uncovered a clandestine network involved in illegal arms trading.
记者揭露了一个涉及非法军火交易的秘密网络。
The rebels smuggled weapons into the country through a clandestine route.
反叛分子通过一条秘密路线将武器偷运进国内。
She wore a disguise for her clandestine mission to gather intelligence on the enemy's camp.
她为了秘密任务伪装自己，以搜集敌人营地的情报。
The discovery of a clandestine laboratory led to the arrest of several drug traffickers.
一个秘密实验室的发现导致了几名毒品贩子的被捕。
They communicated via encrypted messages to keep their collaboration clandestine.
他们通过加密信息交流，以保持合作的秘密性。
The government was accused of conducting clandestine experiments on unsuspecting citizens.
政府被指控对不知情的公民进行了秘密实验。
In the dead of night, they carried out a clandestine rescue operation behind enemy lines.
在深夜里，他们在敌后秘密地执行了一次救援行动。