a number of：許多的；

　　例句：

　　There were a number of errors and omissions in the article.

　　這篇文章中有多處錯誤和疏漏。

　　A number of people have been employed to deal with the backlog of work.

　　已雇來一些人處理積壓的工作。

　　They were planning to solicit funds from a number of organizations.

　　他們正計劃向一些機構募集資金。

　　This model comes with a number of optional extras.

　　這一型號有一系列可供選擇的附件，價格另計。