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 Attitude Toward Youth Sports对体育的态度要正确positive relative reserve convergence正相对储备集合, 正相对集合positive displacement type flow meter容积式流量计positive pressure breathing apparatus正压式呼吸器具positive-phase-sequence reactance正相电抗positive serial correlation in demand需求相关性positive crankcase ventilation system强制曲轴箱通风系positive-phase-sequence impedance正相序阻抗positive negative ambivalent quotient正负矛盾情绪商positive crankcase ventilating system强制曲轴箱通风装置