单词：canning material
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By Gary Garriott Broadcast: September 1, 2003 This is Sarah Long with the VOA Special English Development Report. People have always had to find ways to keep food safe to eat. Methods to dry, smoke an
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DEVELOPMENT REPORT – Canning Food By Gary Garriott Broadcast: Monday, January 03, 2005 I'm Gwen Outen with the VOA Special English Development Report. People have always had to find ways to keep foo
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UNIT 47 EDUCATION ( Ⅱ ) Lesson 93 Part Ⅰ UNIT 47 EDUCATION ( Ⅱ ) Lesson 93 Part Ⅰ Warming-up Exercises Note-taking: Some Undergraduate Courses in an English Department Engl 115 _______________
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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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Scientists Create Blackest Material Ever Of all the black things in the universe only the infamous black holes are so black that not even a tiny amount of light can bounce back. But scientists have managed to create material almost as black, and it h
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By Priscilla Huff Washington 02 October 2007 The United States is well-known for its youth-obsessed culture, but in reality there is a huge generation of so-called baby boomers --Americans born after World War Two. They number some 80 million people
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