单词：tetrakis hexahedra
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Indians have joyously greeted the news of the country's first-ever Olympic gold medal in an individual event. The milestone at the Olympic Games in Beijing has resulted in an outpouring of national pride. Anjana Pasricha reports from New Delhi that
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10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur
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