What it does mean is that the book business will go through a transformation in the next decade or so more profound than any it has seen since Gutenberg introduced printing from moveable type in the 1450s.
出自-2014年6月阅读原文
Printing with moveable type on paper dramatically reduced the cost of producing a book compared with the old-fashioned ones handwritten on vellum, which comes from sheepskin
出自-2014年6月阅读原文
After swiping(敲击)into the iPad app (应用软件 ), which you can get for free here, he opens up a few different types of textbooks.
出自-2013年6月阅读原文