top-secret

adj.

极机密的；

Top secret
TOP SECRET
Nuclear physics. Belgrade lab sets new course after top-secret uranium grab.
Top-Secret Multi-Agent Systems
Top-secret U.S. intelligence files show new levels of distrust of Pakistan
Google Throws Open Doors to Its Top-secret Data Center
Google Throws Open Doors to Its Top-Secret Data Center
The Top-Secret Life of Lev Landau
The Pentagon`s Brain: An Uncensored History of Darpa, America`s Top-Secret Military Research Agency
Missile Defender. (Book Reviews: Teller's War. The Top-Secret Story Behind the Star Wars Deception.)