1、hat[hAt]n.帽子vt.戴帽子HAT=Hardness Assurance Test 硬度保证测试hathatAHD:[h2t] D.J.[h#t]K.K.[h#t]n.（名词）A covering for the head, especially one with a shaped crown and brim.帽子：特指具有特定造型的顶和沿的头上的覆盖物A head covering of distinctive color and shape worn as a symbol of office.区别职务的帽子：表明特定职位的有特定颜色或形状的帽子The office symbolized by the wearing of such a head covering.职务，职位：由带这种帽子所象征的职位A role or an office symbolized by or as if by the wearing of different head coverings:角色，身份：由不同帽子的配戴所代表的角色或职权：wears two hats—one as parent and one as corporate executive.双重身份--既是父母又是法人代表v.tr.（及物动词）hat.ted。

2、hat.ting， hatsTo supply or cover with a hat.提供帽子或用帽子覆盖。