Dr Ryan travelled the world gathering material for his book.瑞安博士周游世界为他的书搜集资料。She's doing some research in the library.她正在图书馆搜集资料。He was quarrying away in the reference library.他在参考书阅览室里努力搜集资料。We must collect and card our own material.我们必须自己搜集资料并编成卡片。