Unan乌南
unaabbr.(英国)联合国协会(=United Nations Association)Una.n.尤娜(女子名)
unattached college独立学院
unaccounted person下落不明者
unarrested landing无拦阻着陆
unassignable costs不可避免成本
unaccepted product不合格品
unadjusted credits未调整贷项
unattached gingiva非附着龈
unaffiliated union独立工会
unactivity pathway失活途径
unattenuating wave等幅波