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SSS 2008-02-25

时间:2010-05-13 02:42来源:互联网 提供网友:0922013129   字体: [ ]
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    (单词翻译:双击或拖选)

Transcript1

This is Scientific American's 60-Second Science, I am Cynthia Graber.This will just take a minute.

Physicists2 at the Brookhaven National Laboratory have  been able to send information ahead of  particle beams racing3 at nearly the speed of light.And the message to the beams is get in line. This technique has been developed at other labs but never used before with particle beams travelling in discrete4 bunches, these bunches are important and recreating that singular moment: the Big Bang.In these experiments, there are 2 different sets of ions electrically charged particals zooming5 towards each other around a 2.4 mile track. They collide into one another to recreate conditions that provide info about the Big Bang.But the ions spread out as they move and this means there are fewer collisions. In a technique called stochastic cooling.Scientists first measure fluctuations6 in the beams of ions, then they send signals even faster than these particles to devices up ahead that can kick those particles back into shape. Researchers say this technique allows them to create these collisions much more frequently and cheaply than other methods.And so they can get more and better data about what our universe might have been like just after it came into existence.

 

Thanks for the minute, for Scientific American's 60-Second Science, I am Cynthia Graber.

 


点击收听单词发音收听单词发音  

1 transcript JgpzUp     
n.抄本,誊本,副本,肄业证书
参考例句:
  • A transcript of the tapes was presented as evidence in court.一份录音带的文字本作为证据被呈交法庭。
  • They wouldn't let me have a transcript of the interview.他们拒绝给我一份采访的文字整理稿。
2 physicists 18316b43c980524885c1a898ed1528b1     
物理学家( physicist的名词复数 )
参考例句:
  • For many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说,这是受挫折的一年。 来自英汉非文学 - 科技
  • Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。
3 racing 1ksz3w     
n.竞赛,赛马;adj.竞赛用的,赛马用的
参考例句:
  • I was watching the racing on television last night.昨晚我在电视上看赛马。
  • The two racing drivers fenced for a chance to gain the lead.两个赛车手伺机竞相领先。
4 discrete 1Z5zn     
adj.个别的,分离的,不连续的
参考例句:
  • The picture consists of a lot of discrete spots of colour.这幅画由许多不相连的色点组成。
  • Most staple fibers are discrete,individual entities.大多数短纤维是不联系的单独实体。
5 zooming 2d7d75756aa4dd6b055c7703ff35c285     
adj.快速上升的v.(飞机、汽车等)急速移动( zoom的过去分词 );(价格、费用等)急升,猛涨
参考例句:
  • Zooming and panning are navigational tools for exploring 2D and 3D information. 缩放和平移是浏览二维和三维信息的导航工具。 来自About Face 3交互设计精髓
  • Panning and zooming, especially when paired together, create navigation difficulties for users. 对于用户来说,平移和缩放一起使用时,产生了更多的导航困难。 来自About Face 3交互设计精髓
6 fluctuations 5ffd9bfff797526ec241b97cfb872d61     
波动,涨落,起伏( fluctuation的名词复数 )
参考例句:
  • He showed the price fluctuations in a statistical table. 他用统计表显示价格的波动。
  • There were so many unpredictable fluctuations on the Stock Exchange. 股票市场瞬息万变。
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