negative sol阴电(荷)溶胶,负电(性)溶胶negativeadj.否定的；消极的；负面的；负的n.否定；反面意见；底片；[数]负数vt.否定negative cut-off grid voltage负截止栅压negative temprature coefficient负温度系数negative voltage gain amplifier负电压增益放大器negative acknowledgement signal否定信号negative resistance oscillation负阻振荡Negative ion air purifying lamp负离子空气净化灯negative particular proposition否定特称命题negative increase of population人口负增长negative-resistance magnetron负阻磁控管negative-phase sequence relay反相序继电器