Amazon hit a symbolic milestone last holiday season, when for one day its sales of e-books exceeded the number of dead-tree books it had sold.
在刚刚过去的节日销售旺季里，亚马逊曾实现了一个里程碑式的跨越：电子书在某一天的销量超过了纸质书籍！
Amazon hit a symbolic milestone last holiday season, when for one day its sales of e-books exceeded the number of dead-tree books it had sold.
在刚刚过去的节日销售旺季里，亚马逊曾实现了一个里程碑式的跨越：电子书在某一天的销量超过了纸质书籍！
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