These days, he was collecting materials for a book on football match.
这些日子，他正在收集一本关于足球比赛的书的材料。
A book may have weight, price, and construction materials as well as information content.
图书可能具有重量、价格和制作材料以及信息内容等属性。
He is collecting materials for a book.
他正在为写书搜集素材。
He is gathering materials for a new book.
他正在收集资料准备出一本新书。
These materials have been digested into a book.
这些材料已被汇编成书。
He is gathering materials for a new book.
他正在收集资料准备写一本新书。
If anyone tries to tell you we're using fewer materials, send him this book.
如果有人试图告诉你，我们现在用的材料减少了，就给他看这本书。
He collected some materials for his new book.
他为他的新书收集了一些材料。
He collected some materials for his new book.
他为他的新书收集了一些材料。
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