单词：Polyvinylformaldehyde
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757 、 玻璃纤维席 glassfibremats 758 、 界面；分界面；接口 interface 759 、 相差 phasedifference 760 、 相对密度 relativedensity 761 、 砂布 emerycloth 762 、 砂磨 sandin
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It is the eye-popping brand that boasts the worlds most glamorous bras, but Parma resident Roberta Ritter says her Victoria's Secret, Angel Secret Embrace and Very Sexy Extreme Push-Up bras, made her feel anything but glamorous. She says shortly afte
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Recycling Plastics When plastic containers are recycled, they are first cleaned, then ground into tiny pellets and put into a flotation tank. This separates out the various plastic resins from other waste material. Once they are separated out, the pl
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By Jerilyn Watson Broadcast: October 30, 2003 This is Steve Ember with the VOA Special English Education Report. Many people remember the day in school when they had to 1)cut up a dead frog. Students
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1. The AP has obtained this video showing yesterday's underground steam pipe explosion as it happened. The blast in midtown Manhattan killed one person and sent debris and dust flying. 2. A federal judge is dismissing Valerie Plame's lawsuit against
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AILSA CHANG, HOST: We're going to take you back now to the late 1800s, when eating food in the U.S. meant taking a calculated risk. The country was growing. People were moving into cities. And industrialization gave food producers new, sometimes dang
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