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This is the VOA Special English Health Report. An allergy is an unusually strong reaction to a substance. Many things can cause allergies. The most common cause is pollen. Trees usually produce pollen in the spring, grasses in the summer and weeds in

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SSS 2008-02-29

This is Scientific American's 60-Second Science. I'm Karen Hopkin, this'll just take a minute. Next time you are shoveling snow off your walk, don't blame the weatherman, blame bacteria. Because an international team of scientists has found that micr

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SSS 2009-01-16

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Nearly 6 million children in U.S. have food allergy

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CCTV9英语新闻：US media reactions on China's economic growth target

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