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亚马逊升级服务计划使得消费者在通过亚马逊网站购买印刷版图书的同时只需额外付出几美元就可获得该书电子版的在线阅读权限。该新功能的目的在于找到出版公司和消费者之间的中间立场,因为前者想维持对数字访问权限的控制而消费者则愿意为方便获取内容的多种版本付
The Amazon Upgrade Service Program gives consumers online access to the electronic version of the book for an additional $ 1 while purchasing a printed book through Amazon.com. The purpose of this new feature is to find a middle ground between the publishing company and the consumer as the former wants to maintain control over digital access and consumers are willing to pay for various versions of the content to facilitate access