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 capacitance负电容negative electricity负电,阴电negative association负相联negative convergence[医] 负会聚, 负集合(视轴散开)negative enhancement阴性增强negative filter type负滤色镜型negative-grid bias负栅偏压negative good-will负商誉negative charged ion阴离子negative photoresist负性光致抗蚀剂,负性光刻胶