Unas乌纳斯
unaabbr.(英国)联合国协会(=United Nations Association)Una.n.尤娜(女子名)
unascertained risk未确知风险
unassisted takeoff无助推起飞
unadopted measures[法] 未被采用的措施, 有待解决的措施
Unaspis yanonensis柑橘矢尖蚧
unarmed roBBery.被缴械的强盗
Unashamed nepotism一人得志鸡犬升天
unattended factory自动化工厂
unallocated number未分配号码
unanswered letters未答覆的函件
unaccompanied child无人随同的儿童