So if I download an e-book and it has 20 pages -- well, they could be thin, right -- but if it has 500 pages, I want to feel that "Harry Potter" -- it's thick.  So let me show you the shape-changing mobile.
假如我下载了一本电子书，只有二十页厚， 但手机或电纸书是很薄的，是吧。 假若那本书有五百页厚，我希望能感受到 如《哈里波特》一般的厚度。 所以我再来展示一部可变形手机。