differentials差价differentialadj.差别的；特定的；微分的n.差别；工资差额；差动齿轮；[数]微分differential method微分法,差动法differential pickup差动传感器differential fading差分衰落differential system差动制,差动系统differential duties[经] 差别关税differential thrust差异推覆differential thread差动螺纹differential firing换层燃烧differential ration差别费率differential tariff差别税率