单词：de-enrichment 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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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
2018年VOA慢速英语(一)月
By Barbara Schoetzau New York 10 February 2006 Kofi Annan U.N. Secretary-General Kofi Annan is urging Iran to suspend its nuclear activity and allow talks with Russia to move forward. ----------------
2006年VOA标准英语（二月）
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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By Challiss McDonough Cairo 13 April 2006 Iran's president says he will not halt his country's uranium enrichment program, despite international pressure to do so. U.N. Nuclear Chief Mohamed ElBaradei
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TEHRAN, Aug. 15 (Xinhua) -- Iran said on Sunday it will not stop its nuclear fuel enrichment（丰富,改进） activities although Russia would provide it with the nuclear fuel needed to run its Bushehr nuclear power plant. Head of Iran's Majlis ( P
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