negative ads负面广告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 photochrmism逆光致变色negative permeability负磁导率negative dromotropism[医] 负变导性, 传导性减弱negative focal length负焦距negative air pressure负气压negatively correlated负相关negative resist rinse负性光刻胶漂洗剂negative high voltage负高压negative release wave负放水波negative displacement负位移