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。
He is collecting materials for a book.
他正在为写书搜集素材。
He is now collecting material for a book.
现在他正在为写一本书而收集资料。
She's collecting material for a book.
她正在为写书搜集素材。
Tom: On the first page of my stamp-collecting book.
汤姆：在我的集邮册的第一页上。
To correct the negative style of your e-book, it is worth collecting!
一篇纠正你的不良风格的电子书，很值得收藏！
He is collecting material for a book.
他正在聚集写书的资料。
He is collecting material for a book.
他正在聚集写书的资料。
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