positiveismn.实证论；实证主义n.自信；独断positiveadj.积极的；肯定的；明确的；正面的；正数的；阳性的n.正面；正数；正片；[语]原级positive additives正极添加剂positive invariant正不变性positive receiving正像接收,正信号接收positive- region正域positive dc corona正直流电晕positive character正面人物positive euphemism肯定委婉语positive impedance正阻抗positive inotropic增强收缩力的positive shoreline正海滨线