... comparison spectrum 比较光谱 comparison tube 比值管，比色管 comparomicroscope 双片对比显微镜 ...
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与通常晶体管相比，FFJ的有效发射极面积对基极面积之比值提高2～3倍，输出功率-阻抗乘积提高5～10倍。
The ratio of effectual emitter area to base area of a FFJ is 2-3 times greater than a usual transistor and the output power-impedance product is 5-10 times greater.
光电倍增管的增益，是阳极输出电流和光电阴极中光电流的比值，直接关系到电源电压。
The gain of the PMT, that is the ratio of anode output current to the photoelectric current from the photocathode, is directly related to the supply voltage.
方法应用地中海贫血一管筛查法和G6PD比值法检测4268对婚前男女的地中海贫血和G6PD缺乏。
Methods: Using mon-vessel screen method of thalassemia and relative value of G6PD detect thalassemia and G6PD deficiency for man and woman of detection of before marriage in 4268 duplet.
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