差别

difference;disparity;gap
两者之间的～很大。There is a world of difference between the two./毫无～。There is no difference at all./男女 （年龄）～disparity between men and women (in age)/城乡～gap between the urban and rural areas/～汇率discriminatory (or discriminative,differential)exchange rate/～利率interest differential/ ～税制 discriminatory tax system;variable levy system