top secret
成語所屬單字secret
top secret — 慣用語
1. the highest level of secrecy, used especially for government or military informa
1.慣用語
釋義
最高機密
the highest level of secrecy, used especially for government or military information that could endanger national security if revealed
例句
The documents were marked top secret and locked in a special safe in the basement.
Only four government officials knew the top secret location of the emergency shelter.