单词：Rhodiola stapfii
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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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VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Steve Ember. The United States has had fifty states for fifty years. Alaska and Hawaii both joined the Union in nineteen fifty-nine. They were the fi
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VOA标准英语2008年（七月）
By Carol Pearson Washington, DC 08 November 2006 watch Heart Stent report Heart stents are lifesaving medical devices that help prevent heart attacks. Most of these stents are coated with various drugs, but mounting data suggest drug-coated stents c
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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
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