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 degree分异程度differential coding差分编码differential device差动机构differential duplex差动双工differential detect差动检测differential hammer差动式打桩锤differential filter差接滤波器differential-moden.差模差分模式differential switch差动开关differential medium鉴别培养基