unsetadj.未装配的(不固定的)vtunsadj.不对称的Unsaturated Resin不饱和树脂unsaturated group不饱和基unsecured advance[经] 无担保贷款unskillful doctor下工unstated interest未订明利息unsecured lenders[经] 无担保放款人unsaturated acids不饱和酸unsual quantifier非通常量词unsigned contract未签署的合同unseasonably warm反常地温暖

1. The method for the unstart Mach number is described.
   本文还提出了一种确定不起动马赫数的方法。