Angielski ⇄ Rosyjski Wietnamski +

Angielski tezaurus
observation ['ɔbzə'veɪʃ(ə)n] skr.
skr.	obbo; observ; obsv
skr., wojsk.	obsn; obsr
wojsk., logist.	The condition of weather and terrain that permits a force to see the friendly, enemy, and neutral personnel and systems, and key aspects of the environment. (FRA)