机密的英文：
secret
classified

参考例句：

The workstation does not have a trust secret.
工作站没有信任机密。

Don't spread the closet information around.
别到处宣扬机密。

Leaked classified information to a reporter.
将机密情报透露给记者

Not publicly disclosed;confidential.
机密的，隐秘的不公共披露的;受限制的

Talks between lawyer and client are privileged
律师与当事人的谈话是机密的。

Talks between lawyer and client are privileged.
律师与当事人的谈话是机密的。

Our leader enjoined upon us the necessity for strict secrecy.
我们的领导嘱咐我们要严守机密。

Declared officially secret(by a government)and available only to certain people
(由政府)定为机密而仅供某些人使用的

The spies hatched a scheme to steal government secrets.
间谍们阴谋偷盗政府的机密。

The bill gives sensitive police files a blanket exemption.
该议案提出警方机密档案全部免责。

secret是什么意思：
adj. 秘密的，机密的；私下的；隐蔽的；神秘的；偏僻的
n. 秘密，机密；内情；神秘，奥秘；秘诀，诀窍；秘方

A secret between more than two is no secret
两人以上知道的秘密就不算秘密

I confide a secret to a friend.
我向朋友吐露了秘密。

The secret store is headquartered abroad.
这家黑店的总部设在国外。

Scientists have unlocked the secret of the quantum.
科学家们已经揭开了量子的秘密。

This is no secret. It is currently known.
这不是什么秘密。人们一般都知道。

classified是什么意思：
adj. 分类的；类别的；机密的

drag classifier
刮板分粒机|耙式分粒机

A cat is classified as an obligate carnivore.
猫被归类为专性食肉动物。

Answers to these were restricted to a classified supplement.
这些问题的答案限制在一份机密的附录中。

The books and magazines are classified according to subjects.
这儿的书和杂志都是按照科目分类的。

The librarian classified the books according to authors.
图书馆管理员按照作者分类书籍。