Just a year earlier hardbacks had been worth more than three times as much as e-books, according to the Association of American Publishers. Amazon now sells more copies of e-books than paper books.

据美国出版商协会统计，仅仅一年之前精装书的销量还是电子书的三倍，但现在亚马逊售出的电子书拷贝要多于纸质书。

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E-book sales totaled $90.3 million in February, up 202% compared to the same month a year earlier, according to a study from the Association of American Publishers.

根据美国出版商协会的研究报告显示，电子书2月销售额总计9千零三十万，与上年同月相比，上涨了202个百分点。

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The Association of American Publishers' latest data reports that e-book sales grew 163 percent in the month of May and 207 percent year-to-date through May.

美国出版协会最新的数据显示，5月份电子书的销量增长了163个百分点，比去年同期增长了207个百分点。

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Overall U.S. book sales, which include school textbooks, have averaged 4.4% growth annually since 2002, according to the American Association of Publishers.

FORBES: Booking Losses

But statistics released this month by the American Association of Publishers offered some encouraging news about the American book market.

FORBES: What You Can Learn From A Future J.K. Rowling

In April this year the Open Access Trust and the Internet Archive applied to the US courts to join the settlement but this application was rejected by Judge Denny Chin and only Google is included in the agreement with the Author's Guild and the American Association of Publishers.

BBC: Turning the page on Google books