单词：sudden ionospheric disturbance (sid)
单词：sudden ionospheric disturbance (sid) 相关文章
This is Scientific American's 60-Second Science, I'm Karen Hopkin, this will just take a minute. Shakespeare once said: A rose by any other name would smell as sweet. And that is true today as it was 400 years ago. What's different now, though, is th
Scientific American(四)月
Artist:An Pierle Song:As Sudden Tears Fall Sometimes I think youre a wealthy man In your head The way you deal with regret But once in while Now and then Even you Get upset In trance Listening to you In suspense Nothing else to do But your ranch-styl
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By Carol Pearson Washington 25 July 2007 You may have heard about young athletes, still teenagers, whose hearts stop beating, sometimes while playing sports. In many of these cases, their parents and doctors find out after the fact that these young a
2007年VOA标准英语（七月）
The Macondo well operated by BP in the Gulf of Mexico has now been capped with a star adornment that commemorates the 11 people killed when the rig operating on the water surface above the site exploded on April 20. Clean-up efforts continue, though,
VOA标准英语2010年(十一)月
By Kurt Achin Seoul 25 February 2008 The former Seoul mayor who swept December elections in South Korea is getting used to his new title: Mr. President. Lee Myung-bak has taken his oath of office in a formal ceremony in the South Korean capital. VOA
VOA常速英语2008年（二月）
If you don't exercise regularly（有规律的）, a sudden bout of energetic activity can trigger a heart attack, and may even kill you, according to a new study published in JAMA, the journal of the American Medical Association. It sounds like the
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