unsexvt.使失去性功能；使失去性征unsadj.不对称的unstructured meshes非结构网格unscheduled shutdown意外停工unsentenced prisoner待判决犯unsaturated compuond[化] 不饱和化合物unspecified behavior未加规定状态unsaturated compound不饱和化合物unsymmetrical spring不对称的弹簧钢板unshrouded propeller无函道螺旋桨unsymmetrical ketone不对称酮unsupervised cluster无监督聚类