单词：gravity-force
单词：gravity-force 相关文章
Hoverboards Ignore Gravity Can you imagine riding around the streets of your hometown on a skateboard without wheels? In the late 1980s, film director Robert Zemeckis showed a skateboard floating above the ground in his movie Back To The Future Part
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SHIRLEY GRIFFITH:This is Shirley Griffith. STEVE EMBER: And this is Steve Ember with the VOA Special English program, Explorations. Today we tell about one of the world's greatest scientists, Isaac Newton. (MUSIC) SHIRLEY GRIFFITH:Much of today's sci
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This is the VOA Special English Health Report. Governments, businesses and other groups have promised to add three billion dollars to the fight against malaria. The promises came last week at a meeting at the United Nations in New York. The money wi
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You step into an elevator. It starts going down fast. 你进了电梯。电梯开始快速下降。 What would happen if you jumped right when it started going down? 此时，如果你突然往上跳会发生什么事？ Would the ceiling hit your he
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On Alternate Earth, there are Stripers and Checkers. The Stripers have stripes. The Checkers have checks. Stripers and Checkers with only two colors are rich and powerful. Those with fifty colors are the middle class. Those with 100 colors are often
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