Unere乌内雷
UNabbr.(=United Nations) 联合国pron.<口>人,事物,家伙,东西
unnotched type bearing无滚球槽的轴承
uncoupling of vehicles车辆摘钩
uncooled photodetector非冷却光电探测器
Uncaria sessilifructusn.白钩藤
unbalanced grid faults电网不对称故障
unregulated flood flow未调节洪流
undecomposed explosive未变质炸药
uneforceable contracts不能执行的合同
Undeveloped rural area贫困地区农村
uncooperative attitude不合作态度