Unar乌纳尔
unaabbr.(英国)联合国协会(=United Nations Association)Una.n.尤娜(女子名)
unascertained mathematics theory未确知数学理论
unattended and homeless children无人照管和无家可归儿童
Unavoidably slipping and falling蹉跌难免
unadulterated medicinal material道地药材
unadjustable speed electric drive非调速电气传动
unabsorbed manufacturing expenses未分摊制造费用
unadjustable spped electric drive非调速电气传动
unattended transformer substation无人值班变电站