unsayvt.取消;撤回(说过的话)
unsadj.不对称的
unserviceable troops无战斗力的部队
unsymmetric laminate非对称层板
unsaturated solution不饱和溶液
unscheduled teaching课外教学活动
unstructured network无结构化网络
unsymmetrical carbon[化] 不对称碳原子
unspoken requirement[法] 默契
unsystemic fungicide保护性杀菌剂
unsheltered industry无保护工业
unsaturated polyeste不饱和聚酯
"looked through him with blank unseeing eyes"
"blind as an eyeless beggar"