the number of和a number of的区别是意思不同。
双语例句如下:
1.The number of new houses being built is a good index of a country's prosperity.新建房屋的数目是国家繁荣的一个有用指标。
2.The number of students has been falling off recently.近来学生数目越来越少了。
3.The number of new students decreased from 210 to 160 this year.今年新生人数从210减少到160。
4.We restrict the number of students per class to 10.我们将每个班的学生人数限定为10人。
5.The number of employees was reduced from 40 to 25.雇员人数从40人减少到了25人。
6.Concern is growing over the number of children excluded from school.对遭学校开除的儿童人数之众,人们越来越表关注。
7.There has been a sharp rise in the number of people out of work.失业人数急剧增长。
8.The number of people who fail each year is now in single figures.每年考试不及格的学生现在不足十人。
9.The number of reported crimes is increasing at an alarming rate.报警案件的数量正在以惊人的速度增长。