这句话是错误的,应该说：Computers today are much smaller and faster than the ones in the old days.或者说：Computers today are much smaller and faster than those in the old days.意思是：如今的电脑比过去的小得多也快得多.more后面是多音节adj./adv.的原级,smaller是单音节词的比较级,more smaller是典型的错误形式：把两种比较级形式混在一起了