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TechKnow
2013-08-25已完结4 季49 集单集约 25 分钟美国英语Al Jazeera America
TechKnow is a weekly series that explores how the latest scientific discoveries are changing our lives. Our geeky contributors use their diverse backgrounds in science and technology to expose the controversies and celebrate innovative breakthroughs in the U.S. and around the world.