英语 ⇄ 俄语 越南语 +

英语 词库
observation ['ɔbzə'veɪʃ(ə)n] 名词
军队, 后勤	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)
缩写	obbo; observ; obsv
缩写, 军队	obsn; obsr