UNSCn.联合国安全理事会unsadj.不对称的unsaturated oil不饱和原油unsigned number无符号数unshaped signal未成形信号unsubstantiatedadj.无事实根据的unstudded cable无档锚链unspent balance未用完的余额unsigned ballot无记名投票unscreened sand未过筛砂unsprung weight见unsprung mass,簧下重量,弹簧下重量unscheduled use计划外用途