UNOV维也纳联办UNOnum.（意大利语）一uno.n.联合国组织（=United Nations Organization）unobtainable number叫不通的号码unobserved-windown.撤销观察窗口unobligated balance不结转的年终预算结余unogranized ferment离体酶unobservable system不可观察的系统unobtainable object无法达到的目标unorganized fermentn.[生化]离体酶Unobstructed Thromb血栓通unoriented migration不定向洄游unoxidized blowholes[机] 非氧化气孔