| 单词 | 极机密 |
| 释义 | 〔black〕Disclosed, for reasons of security, only to an extremely limited number of authorized persons; very highly classified:极机密的：为了安全原因只有极少数授权人知道的；高度机密的：〔secret〕Containing information, the unauthorized disclosure of which poses a grave threat to national security.极机密的：包含情报的，该情报未经授权的泄露将对国家安全构成严重威胁 |
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