a number of

1. 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。
2. He's been around a long time and has acquired a number of skills.
   长久以来他见过很多世面，学了很多技术。
3. A number of seats have been arranged in front of the painting.
   在这幅油画前摆了一些座位。
4. The research begs a number of questions.
   研究绕过了一些问题。
5. Two significant constants have been found in a number of research studies.
   若干研究已经发现了两个重要常量。
6. 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。
7. A number of very well designed studies have been undertaken.
   已经进行了多项精心规划的研究。
8. 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。
9. There were, however, a number of crucial flaws in his monetary theory
   但是，他的货币理论中存在若干关键性错误。
10. Asmus became friendly with a number of writers and appeared in print as a literary critic.
    阿斯穆斯和许多作家成为了好友，而且还作为一名文学评论家出现在报纸上。
11. It is thought that this virus is implicated in the development of a number of illnesses.
    这种病毒被认为与数种疾病的发生密切相关。
12. There are a number of improvements; for instance, both mouse buttons can now be used
    在许多地方有了改进，例如，鼠标的左右键都可以使用了。
13. The Government has introduced a number of other money-saving moves
    政府已经采取了其他一些省钱的举措。
14. In the light of this information it is now possible to identify a number of key issues.
    根据这一信息，现在有可能弄清楚几个关键问题了。
15. 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。
16. She is known in Italy for a number of minor roles in films
    她因在电影中饰演了一些配角而在意大利为人所知。
17. This equipment has saved the lives of a number of new born children.
    这套设备已经挽救了许多新生儿的生命。
18. The crisis has led to the closure of a number of non-essential government services.
    危机已导致了许多可有可无的政府机构的关闭。
19. A number of the French players went nuts, completely out of control.
    有几个法国运动员简直是疯了，完全失去了控制。
20. A number of beaches in the region have been polluted by sewage pumped into the Irish Sea.
    这一地区的一些海滩已被排放到爱尔兰海的污水污染了。
21. 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。
22. This return to realism has produced a revival of interest in a number of artists
    这种重回现实主义的趋势已经重新激起了人们对许多艺术家的兴趣。
23. The police rounded up a number of suspects
    警方围捕了一些嫌疑犯。
24. A number of the prisoners we saw are starving
    我们看到的一些囚犯快要饿死了。
25. In order to reach this limit a number of technical problems will have to be solved.
    要达到这个限度，还有很多技术问题必须解决。
26. It's a very tricky problem, but I think there are a number of things you can do.
    那是个非常棘手的问题，但我想有几样事你是可以做到的。
27. We have lived here quite a number of years.
    我们在这儿住了好些年了。
28. We've consulted a number of books about the subject in the library.
    我们在图书馆查阅了很多有关这个题目的书籍。
29. A number of houses were burnt down in the fire.
    在火灾中，好些房子给烧毁了。
30. A number of records fell during the sports meet.
    在运动会上破了多项记录。

  a few a number of several some【导航词义：一些】

  a few adj. 一些，几个

〔辨析〕在数量上用于肯定意义，强调有一些，后接复数可数名词。

  a number of 许多…，若干…

〔辨析〕强调数量的概念，也可说 a large/small number of, 后接复数可数名词，谓语动词用复数。

  several adj. 几个，数个

〔辨析〕相对于 a few，some 而言较为正式，一般只能用于肯定句，强调“不止一两个”，后接复数可数名词。

  some adj. 一些，若干

〔辨析〕带有不确定性，多用于肯定句中，后接复数可数名词或不可数名词。