positive set直接用上条柄拨针,固定位置,正集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/negative-parity states正／负宇称态positive expiratory pressure plateau呼气正压坪positive definite symmetric matrices正定对称矩阵positive-discharge bucket elevator强制排料斗式提升机positive vascular conditioned reflex[医] 阳性条件血管反射positive definite quadratic function正定二次函数positive-displacement supercharger给定式增压器positive pseudo-symmetric solution拟对称正解positive Church commercial elites.一些产业精英向商业精英的转化; 6.；外来移民所形成的商业精英positive pressure ventilation system正压通风系统