单词：Rhodobacter
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Rho Ophiuchi dark cloud is one of the closest star-forming regions to our own solar system. Located near the constellations Scorpius and Ophiuchus, the nebula is about 407 light years away from Earth. The infrared astronomical satellite, now celebra
国家地理2008年
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午后咖啡
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
Scientific American(七)月
Personality and Character I: What kind of personality do you think you have? C: I'm easy to approach and friendly to everyone. / I'm inclined to think independently. / Frankly, I have a inquiring mind. / I think I'm a cooperative worker. / Well, I ap
面试英语
By Efam Dovi Accra 24 September 2006 Climate experts from across Africa, meeting in Ghana, say climate change would have a severe impact on Africa's water resources, energy, agriculture and eventually food security. The experts were assessing where
2006年VOA标准英语（九月）
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外研社新标准高中英语选修9
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
美国习惯用语
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
2007年VOA标准英语（九月）
Exhibit Salutes Children's Author Who Introduced Minority Characters Shakespeare asked, What's in a Name? A lot, it turns out. Take Ezra Jack Keats, the famous childrens book author and illustrator, who died in 1983. Keats wrote and illustrated more
VOA标准英语2011年(十一月)
BEIJING, March 24 (Xinhuanet) -- A new study has found that Actos, a medicine treats onset diabetes, could also reduce the diabetes(糖尿病) risk in people with prediabetes. The study, which was published Wednesday in New England Journal of Medicin
英语新闻
Transcript for Reference Only --chunshan The infrared astronomical satellite, now celebrating its 25th anniversary, gave us the first all sky view of our dusty infrared universe. Floating above the galactic center is the Rho Ophiuchi Cloud, about 400
自然百科2008年