the number of 和 a number of 的区别用法

一、the number of 意为“……的数目；……的数量”，其后接可数名词的复数形式。作主语时，谓语动词用第三人称单数形式。如：
The number of the soidiers is 110,000. 士兵的数量是11万。
The new digital technology would allow a rapid expansion in the number of TV channels.新的数字技术将会使电视频道的数量迅速增加。
The first and most stubborn problem was that of reductions in the number of aircraft.  最首要也是最棘手的问题是飞机数量的减少。
International rules stipulate the number of foreign entrants. 国际规则规定了外国参赛者的人数。
This takes account of the number of countries in which a company wins approval for a new drug, weighted by the size of each country's market. 这考虑到了允许一家公司的新药在本国上市的国家的数量，并依照每个国家的市场规模权衡其重要性。
The number of young people obtaining qualifications has remained static or decreased.获得资格证的年轻人数量一直维持不变或出现下降。
二、a number of 意为“许多；大量”，常用来修饰可数名词。作主语时，谓语动词用复数形式。如：
A number of students are playing on the playground. 许多学生在操场上玩。
A number of problems marred the smooth running of this event. 许多问题影响了这件事的顺利进行。
Protesters have been putting up barricades across a number of major intersections. 抗议者们在许多主要的十字路口设置了路障。
She retained a number of copies for further annotation. 她保留了许多副本以便作进一步的注解。
This view is contrary to the aims of critical social research for a number of reasons. 之所以说此观点违背了批判性社会研究的宗旨，有几点理由。
A number of houses were burnt down in the fire.  在火灾中，好些房子给烧毁了。
A number of them have filed formal complaints against the police. 他们中的许多人都对警方提出了正式控告。
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