Such background material inevitably reflects who we are.

这些背景信息必然会反映出读者的个人特质。

The author included a new chapter of background material for the second edition of the book.

【background】作者为本书第二版新加了一章背景材料。

Review your notes and other background material if available because increased knowledge results in increased interest.

复习你的笔记和其他背景材料（如果有的话），因为知识的增加会增加兴趣。

It took Akeley four years to complete these groups, for as he went along he had to work out his method of constructing manikins and of making such background materials as artificial snow, moss, and leaves.

阿克利花了四年时间才完成这些作品，在制作过程中，他必须想出制作模型和制作人工雪，人工苔藓以及人工树叶等背景材料。