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-entropies capital负熵资本negative vertival divergence负垂直偏斜negative acceleration motion减速运动negative linear relationship负线性关系negative refractive material负折射率材料negative affective influence负面情感影响negative-activation method负激活法negative summating potential负总和电位, 负和电位negative friction resistance负摩阻力negative contribution margin负贡献毛益