Unell于内尔UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西undifferentiated curve无差异曲线uncollected commission[经] 未收佣金unknowing aid to enemy无知的[自己不知道的]利敌行为undistributed earnings[经] 未分配盈余(收益)unweighted noise level未加权噪声电平unthreaded round drill无螺纹钻头unmaned aerial vehicle无人机unbalance compensation不平衡补偿uncompleted production在产品unmatched in the world天下独步