negative AGC反向自动增益控制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 Learning Psychology负面学习心理negative pressure extraction负压抽提negative surface segregation表面负偏析negative going sawtooth wave负向锯齿波negative three distributions负三项分布negative vertical divergence[医] 负垂直偏斜negative DC corona discharge负直流电晕放电negative-control thyratron负压控制闸流管negative selection mechanism反面选择机理negative-supply regulation负压稳定