单词：undelved
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This is Scientific Americans 60-Second Science, I am Cynthia Graber. This will just take a minute. Western Mexico and countries on the west coast of South America had ancient relationships, involving trade in goods and culture. Now MIT students have
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Even as a child, Ed Dwight had a gift for art. But he set that talent aside to focus on careers that included engineer, test pilot, astronaut trainee (the first African American in the program) and entrepreneur. It was as the owner of a large constru
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It seemed as if there was no end of strangeness. For the first time, as James Trefil has put it, scientists had encountered an area of the universe that our brains just arent wired to understand. Or as Feynman expressed it, things on a small scale be
万物简史
Mon Dieu, I hope the sun hasn't affected me, he muttered. 上帝啊，我不是被太阳晒昏了吧，他喃喃自语道。 A slight movement attracted his attention, and he saw that Ata was lying on the floor, sobbing quietly. 一个人影晃动了一
月亮和六便士