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For streaming video, it is common to say: 低清 (under 480p = 480 horizontal lines) 標清 (DVD resolution: 480p/576p) 高清 (720p or above) Downloadable videos are sometimes marked as "超高清", which may mean 1080p (or even 4K), or simply a high bitrate 720p encode having excellent quality.


First, there is no legal source to download both of them. More specific, they're content of copyright. The Commercial Press has made great effort to ban online version to protect its interest. So you can hardly find the website which is providing PDF or other format. However, there's another way, but you'd pay a little money(~$2). Visit the greatest ...

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