science and technology 科技
2014年11月4日 星期二
amateurs talk about technology, professionals talk about insurance.
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After the crash of Richard Branson's SpaceShipTwo rocket plane on Friday, what are the implications for private space firms? http://ec...
2014年11月3日 星期一
Surface tension in tennis ( FT)
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November 2, 2014 5:16 pm Surface tension in tennis John Burn-Murdoch and Gavin Jackson Author alerts E ach of tennis’s three sur...
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