For more than 500 years the book has been a remarkably stable entity: a coherent string of connected words, printed on paper and bound between covers.
500多年来，书一直是相当稳定的物体：由具有条理的字符串连而成，被印在纸上，有封面和封底。
Network electronic documents, as well as the impact of electric paper book, is bound to bring new thinking for the development trend of the traditional paper-based books.
网络电子文件以及电纸书带来的冲击，必将给传统纸质书籍的发展趋势带来新的思考。
The book was bound in paper covers.
这本书是平装的。
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