blonde和fair区别是指代不同、用法不同、侧重点不同。blonde的意思是金黄色的，侧重于指颜色很艳丽的黄色，fair的意思是浅色，还可指事情不算好，也不算坏，侧重于指略显苍白的黄色。

例句：I thought she would be small and blonde but she's the complete opposite.我原以为她是一位身材娇小的金发女郎，但她恰恰相反。He walked in with a tall blonde on his arm.他手挽着一个高个子金发女郎走了进来。They'll respect you as long as you play fair.只要为人正直，别人就会尊敬你。