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-sequence harmonic component正序谐波
positive phenotypic assortative mating正表型选同交配
Positive and negative rotation control正反转控制
positive negative pressure ventilation正负压通气
Positive-Expulsion Propellant System正向逐出推进系统
positively and negatively worded items正向和反向陈述题目
positive-displacement metering valve步进式计量阀,容积式计量阀
positive xenobiot-responsive element正异生物应答元件