fewer……than
解释:! Sometimes people use less before a plural noun, but many people think that this is incorrect, so it is better to use fewer
【有时候在复数名词前使用less,但是多数人认为是不对的,所以用fewer好些】
例句--a village of fewer (NOT less) than 200 inhabitants
来自朗文字典的解释,有兴趣的话,看看下面的网址http://www.***.com/dictionary/less_2