state secret

基本解释

In private even academics in favour of hydropower development complain that nearly all relevant information, even the amount of rain that reaches them, is treated as a state secret.
私下，甚至一些支持水利事業發展的學者抱怨，他們得到的所有相關信息，甚至包括降雨量，都被眡爲國家機密。
Because the minister was also a close friend of M. Walter, it was not difficult for de Cantel's new paramour to learn the state secret that France would soon guarantee the Moroccan debt.
因爲部長也是華代爾先生的密友，所以德•坎特爾的新情人不費什麽周折便了解到一項國家機密：法國不久將承諾擔保摩洛哥的債務。
The exact number is a state secret.
準確的數字屬於國家秘密。

He's recovering from intestinal surgery and an undisclosed illness that's treated as a state secret.
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The Supreme Court accepted the idea of a state secret privilege more than 50 years ago.
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Grain reserves are said to be at a record high—although their precise level remains a state secret.
ECONOMIST: China