1. less +形容词+复数名词结构，less是副词、修饰形容词，表示“差，轻微、逊色一点”等含义：
He smoked less expensive cigarettes he bought.
他吸的烟，较之他的支付能力是比较低廉的。
Other less profitable services are to be axed later this year.
其他盈利较少的服务项目预定今年稍晚将大量削减。
2. fewer+形容词+复数名词的结构；fewer是数量词，修饰名词的，表示在数量上较少。
He smoked fewer expensive cigarettes he bought.
他吸的高价烟比他买的高价烟少。
Other fewer profitable services are to be axed later this year.
其他少量的盈利的服务项目预定今年稍晚将大量削减。
再如：
Contrary to popular belief, women cause fewer road accidents than men.
与普遍的看法相反，妇女交通肇事比男人少。
There would be fewer international crises demanding his attention
需要他去关注的国际危机将会减少。
They will make economies by hiring fewer part-time workers.
他们将通过减少雇用兼职工人来节省开支。