单词：phenylhydrazine urea
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For 40 years, Paul Karason was a fair skin son of the American Northwest, freckles and reddish-blond hair. Like most people who grow older, Pauls hair turned white. But how does he explain this? What was that Aha moment were you think, you know, my
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-Sheldon：Worst renaissance fair ever. renaissance：文艺复兴 fair：集市，集会 史上最逊的文艺复兴集会。 -Leonard：Please let it go, Sheldon. 别再墨迹了Sheldon。 -Sheldon：It was rife with historical inaccuracies. be rif
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DEVELOPMENT REPORT - Aid Group Designs System to Make Dirty Water Safe to Drink By Jill Moss Broadcast: Monday, October 17, 2005 This is Steve Ember with the VOA Special English Development Report. Ea
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Broadcast: May 5, 2003 By Jill Moss This is the VOA Special English Development Report. Each year more than two-million people die from diseases caused by drinking dirty water. That is the estimate of
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AS IT IS 2014-09-03 Virginia Site Tests Drones for FAA Rules 维吉尼亚测试无人机以帮助航空管理局制定发展规则 The Federal Aviation Administration, or FAA, has chosen a university town in Virginia as one of six places to test dron
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Researchers from the Third Military Medical University in China said they have developed a cheap, easy test to determine a patient's blood type in a matter of seconds with nearly perfect accuracy. 我国第三军医大学的研究人员日前表示，已
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