大家在查： positive energy theorem Positive Film positive inotropic action positive interference positive mental attitude positive economics positive duty positive definite quadratic form positive character Positive Analysis

positive effector

positive effector

凡是能加速反应的称为正效应物(positive effector)(正反馈物)；凡是能使反应速度减慢的称负效应物(negative effector)(负反馈物)。