- differential (between A and B)
a difference in the amount, value or size of something, especially the difference in rates of pay for people doing different work in the same industry or profession 差别；差额；差价；（尤指同行业不同工种的）工资级差 wage/pay/income differentials 工资／收入差异
- (also differential gear)
a gear that makes it possible for a vehicle’s back wheels to turn at different speeds when going around corners （汽车）差速器
Word Originmid 17th cent.: from medieval Latin differentialis, from Latin differentia ‘difference’from different- ‘carrying away’, from the verb differre, from dis- ‘from, away’ + ferre ‘bring, carry’.