When you consider that it was only with the appearance of Amazon's first Kindle reader in 2007 that e-book sales took off, the pace of change is stunning.
想想2007年亚马逊的第一部Kindle阅读器才上市，彼时电子书销售刚刚起步，这变化速度真是惊人。
When you consider that it was only with the appearance of Amazon's first Kindle reader in 2007 that e-book sales took off, the pace of change is stunning.
想想2007年亚马逊的第一部Kindle阅读器才上市，彼时电子书销售刚刚起步，这变化速度真是惊人。
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