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SSS 2009-06-26

时间:2010-05-18 02:59来源:互联网 提供网友:mark@li   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science, I’m Karen Hopkin. This will just take a minute.

Last month, President Obama pledged nearly half a billion dollars toward the development of solar and geothermal energies, but what about wind? A team of scientists estimates that wind turbines in the continental1 U.S. could produce 16 times more electricity than we currently use. They present their data in the current Proceedings2 of the National Academy of Sciences. We all know that wind can be harnessed to do work. But this power source can be a bit fickle- today it might gust3, while tomorrow could bring barely a breeze. So how much can we count on the movement of air to meet all our energy needs? The scientists used data from satellites, balloons, and aircrafts, to estimate wind speeds around the planet. They excluded cities, forests, and ice-covered areas, which would all be hard to harvest. Crunching4 the numbers, they concluded that a global network of land-based turbines could make 40 times more electricity than the world currently consumes, even if they only operated at 20 percent of their capacity. People may balk5 at the sight of a sea of wind turbines. And flying wildlife may be bollixed by the blades. But wind power’s benefits may blow away its problems.

 

Thanks for the minute for Scientific American’s 60-Second Science, I’m Karen Hopkin.

 


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1 continental Zazyk     
adj.大陆的,大陆性的,欧洲大陆的
参考例句:
  • A continental climate is different from an insular one.大陆性气候不同于岛屿气候。
  • The most ancient parts of the continental crust are 4000 million years old.大陆地壳最古老的部分有40亿年历史。
2 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
3 gust q5Zyu     
n.阵风,突然一阵(雨、烟等),(感情的)迸发
参考例句:
  • A gust of wind blew the front door shut.一阵大风吹来,把前门关上了。
  • A gust of happiness swept through her.一股幸福的暖流流遍她的全身。
4 crunching crunching     
v.嘎吱嘎吱地咬嚼( crunch的现在分词 );嘎吱作响;(快速大量地)处理信息;数字捣弄
参考例句:
  • The horses were crunching their straw at their manger. 这些马在嘎吱嘎吱地吃槽里的草。 来自《简明英汉词典》
  • The dog was crunching a bone. 狗正嘎吱嘎吱地嚼骨头。 来自《简明英汉词典》
5 balk RP2y1     
n.大方木料;v.妨碍;不愿前进或从事某事
参考例句:
  • We get strong indications that his agent would balk at that request.我们得到的强烈暗示是他的经纪人会回避那个要求。
  • He shored up the wall with a thick balk of wood.他用一根粗大的木头把墙撑住。
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TAG标签:   SSS  continental
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