单词：activated-charcoal filter bed
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Time stopped in the year 79 AD. Mt. Vesuvius erupted, sealing two Italian towns in ash, mud and lava: the better-known city of Pompeii and the seaside resort of Herculaneumit was a vacation spot of choice for wealthy Romans. In 1752, workers excavati
自然百科2010年
Song：Who's Been Sleeping In My Bed Artist：Brosis Who's been sleeping in my bed? Ain't nobody sleeping in your bed,what you're talking about? I'm innocent,I didn't treat you bad girl, What you're talking about? What? what? Chorus: Who's been sleep
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This is the VOA Special English Development Report. Every day, millions of people around the world drink water from wells that are polluted with high levels of arsenic. Arsenic is an element that can be released into groundwater by soil and rocks. Ov
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By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica
2007年VOA标准英语（五月）
Check this out.Just get down here.There's a bit of water. 瞧 从这下去 有一小滩水 It's probably gonna be rainwater that's come down here and collected. 有可能是雨水 流淌进来之后被积攒了下来 The thing is, because it's shady,
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