This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. In 2005 two scientists won a Nobel Prize for discovering that a bacterium called Helicobacter pylori causes most stomach ulcers. One of them even chugged a

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个性品德Personality and Character篇

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面试英语

2006年VOA标准英语-Experts Discuss Impact of Climate Change on Wat

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美国习惯用语:293 class act; hard act to follow;

今天要讲的惯用语里有个共同的词act。这真是个多义词，但是我们的时间有限说不了那么多，所以今天要说到的act都有表演的意思。比方说，我们要学的第一个习惯用语是：class act。 Class这里

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By Margaret Besheer United Nations 25 September 2007 An unprecedented summit on climate change has ended at the United Nations. Secretary-General Ban Ki-moon says the event has sent a powerful political signal to the world that there is the will and

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2007年VOA标准英语（九月）

VOA慢速英语-Development Report - Farming Techniques That Will Fe

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VOA标准英语2009年(二月)

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好听的英文歌曲

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VOA标准英语2011年(十一月)

Actos prevents diabetes in high-risk people

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加州英语分级G1

2016年CRI UrbanTec Aisa 2016 to Focus on Ecology, Information and Life

Reporter: With the theme of Ecology, Information and Life, this year's Urban Tec Asia, the fourth of its kind, aims to address the most painful urbanization problem - ecological damage. Top intellectuals and businesses from around the world will focu

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2016CRI中国国际广播电台

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accidental evolution

alternate-direct current comparator

alternative optima solution

amaranth family

ambystomids

angled fiber

approximately equivalent

artisanally

astrographic objective

auditory after-sensation

average solar day