单词:retrogradeurography
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Pre-Listening Vocabulary revolution: to go around something (Earth revolves around the Sun.) rotation: the spinning of something (Venuss rotation is backwards.) axis: a real or imaginary line that something rotates on retrograde: in a backwards movem
Topic1-Have we entered the paying-for-knowledge era Two popular content providers, Luo Yonghao and Papi Jiang have recently announced their departure from Fenda, a paywall platform that have opinion leaders and celebrities answer user's questions for
It started with a simple experiment: take some graphite - the black stuff in the middle of a pencil - and put a piece of tape over it. When the scientists at the University of Manchester did that, they found that they could develop a material that co
Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯 In 2004, two scientists at the University of Manchester in England isolated a carbon-based material called graphene, with some unusual properties. Andre
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By Delia Robertson Johannesburg 23 October 2007 South Africa's rugby world-champion, the Springboks, have returned home to a rapturous welcome following their victory over England at the Rugby World Cup in France. VOA's Delia Robertson reports from J