单词：activated-charcoal filter
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But the HEPA filter for Olivers Vibe got dirty very quickly. And, it was not cleanableit was simply replaceable. When it turned filthy brown, Oliver went back to Target to buy a new filter. Oddly, Target sold the F15 belt for the Vibe, but not the fi
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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
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From VOA Learning English, this is the Health Lifestyle report. In parts of India, it is not uncommon to see people wearing a mask over their nose and mouth. The capital, New Delhi, has some of the world's dirtiest air. The pollution was a call for a
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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
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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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