a large number of = a great number of 只修饰可数名词
a great amount of 只修饰不可数名词
例1.A great number of houses were burnt to ashes.
大量的房屋被烧成了灰烬.
例2.In China,a large number of families have there own car.
在中国,大部分家庭都拥有自己的车.
例3.He gave his wife a great amount of money.
他给了他妻子一大笔钱.
例4.We have a great amount of experience with interviews.
我们在这方面有很多经验.
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