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
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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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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
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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）
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)