an undercover operation/investigation

When you go undercover, you have to do things you wouldn't normally do.

当你伪装时, 你会做一些和平时不一样的事.

...undercover FBI agents.

联邦调查局的密探

The plaza is teeming with undercover policemen.

这个广场上布满了便衣警察.

After two years of using an undercover operation, the FBI finally arrested the Cuban drug king.

经过两年的秘密行动, 联邦调查局终于逮捕了这位古巴毒枭.

She worked as an undercover agent for the police.

她为警察当密探.

A range of solvent based and emulsion type rust preventives, offering indoor and undercover outdoor protection.

包括溶剂型和乳液型防锈剂, 可提供不同期限的室内和有遮护的室外保护.

The Gaucho began to talk, calmly but with an undercurrent of passion ( Thomas Pynchon )

这个高卓人开始讲话, 平静的表面掩饰着潜化的激情 ( 托马斯平琼 )

In violent America, there still exists an undercurrent of prejudice against Chinese.

在崇尚暴力的美国, 仍然存在着对中国人偏见的暗流.

...a deep undercurrent of racism in British society.

英国社会中强劲的种族主义暗流

The stately gloom of official mourning was relieved by an undercurrent of suspense.

正式葬礼的悲哀由于一种潜在的不安所减轻了.

Perhaps the rain cover, the undercurrent may be coming.

也许风雨覆盖, 也许暗潮涌来.

The flowing rapidly undercurrent in water still lets us turn over a ship.

水中湍急的暗流还是让我们翻了船.

The undercurrent of despair or madness or illogicalness would lead to the impossible fantasies of future.

无意识当中的绝望、狂热、无逻辑性会导致未来难以想象的疯狂.

There was no subtle undercurrent to the question.

他的话里并没有什么隐晦的暗示.

That bright star is not a secret behind the undercurrent?

那闪亮的星光背后是不是有暗暗的潜流?

But an undercurrent of gloom ran through the whole day.

但是这一天全家人心中笼罩着一片阴影.

An underlying or implied tendency or meaning; an undercurrent.

含意;暗流; ''.'内在'.''''.'性质'. ''隐含的或含蓄的倾向或意义;潜在势力.

An undercurrent of resentment swept through the room.

一股怨气的暗流席卷整个房间.

His writing lacks this undercurrent of protest and satire.

他的创作缺乏抗议和讽刺的潜在力量.

Colin tried to swim after him but the strong undercurrent swept them apart.

科林想跟在他后面游，但强大的暗流把他们分开了。