他们签署了一份保守机密的协议。

They signed a confidentiality agreement.

《牛津词典》

企业和政府机构日常面临的最大威胁来自于希望窃取金融数据和商业机密的骗子和间谍。

The biggest day-to-day threats faced by companies and government agencies come from crooks and spooks hoping to steal financial data and trade secrets.

youdao

貌似这里往北的地方有个非常机密的项目正在进行。

Apparently there's a very hush-hush project under way up north.

《柯林斯英汉双解大词典》

But in this movie, the kid gets a little secret decoder ring.

不过在这个电影中，那个小孩得到了一个小的机密解码戒指。

哈佛公开课 - 计算机科学课程节选

It's a secret number so that if Julius Caesar scrambled his message with the key 13, well, then the recipient had better know what that number is or realistically, -- and this is why it's kind of hard to buy -- into some of these age old algorithms, -- what would an alternative approach be to figuring out Julius Caesar's messages to his generals if he didn't know that secret number was 13?

它是一个机密的数字，以至于,如果凯撒大帝使用密钥13加密了它的消息，然后接收者最好知道那个数字是什么,实际上--这就是为什么很难,破解这些古老的算法-,有什么变换方法使凯撒大帝的将军,可以解密凯撒大帝的消息，如果他不知道,那个机密数字是13呢？

哈佛公开课 - 计算机科学课程节选