单词：phosphate softening
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[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:05.57]2004 Text3 [00:08.09]When it comes to the slowing economy, [00:10.41]Ellen Spero isn't biting her nails just yet. [00:14.13]But the 47-year-old manicurist isn't cutting, [00:17.67]filin
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From NPR News in Washington, I'm Lakshmi Singh. Yemen's president is reported to be gravely wounded. Various news agencies, citing US officials, say Ali Abdullah Saleh has suffered burns on about 40% of his body and shrapnel wounds from an attack on
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pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
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1. A wildfire in Arizona is now the State's third largest ever. Officials say the blaze covers about 287 square miles and is expected to grow larger. Some 1,300 firefighters, some from as far away as New York, are working the wildfire. 2. Authorities
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Tess was a precocious eight-year-old girl when she heard her Mom and Dad talking about her little brother, Andrew. All she knew was that he was very sick and they were completely out of money. They were moving to an apartment complex next month becau
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