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SSS 2008-12-31

时间:2010-05-15 08:10来源:互联网 提供网友:木渐浅。   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.

 

It’s the time of year to take a look back—and that’s just what the journal Science did as they listed their most important breakthroughs of 2008. At the very top of their list: reprogramming cells. Scientists were able to successfully transform cells from ill patients into stem cells. This is important in understanding exactly how cells develop, and it could be a crucial step in finding a way to treat disease by using a patient’s own cells.

A few other top achievements of 2008:


-For the first time, scientists have been able to actually see planets orbiting a distant star.
-A team discovered a catalyst1 that can facilitate using electricity to split water into hydrogen for a fuel cell.


-An entirely2 new family of high-temperature superconductors was discovered.


-And there’s been a genome sequencing bonanza3, as new techniques make the process faster and cheaper. Mitochondrial genomes sequenced this year include extinct cave bears and most of a wooly4 mammoth5. Not to mention a first draft of the full DNA6 sequence of a Neanderthal. Their genome sequence could explain why they never could sequence genomes.

 

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

 


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1 catalyst vOVzu     
n.催化剂,造成变化的人或事
参考例句:
  • A catalyst is a substance which speeds up a chemical reaction.催化剂是一种能加速化学反应的物质。
  • The workers'demand for better conditions was a catalyst for social change.工人们要求改善工作条件促进了社会变革。
2 entirely entirely     
ad.全部地,完整地;完全地,彻底地
参考例句:
  • The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
  • His life was entirely given up to the educational work. 他的一生统统献给了教育工作。
3 bonanza ctjzN     
n.富矿带,幸运,带来好运的事
参考例句:
  • Bargain hunters enjoyed a real bonanza today.到处买便宜货的人今天真是交了好运。
  • What a bonanza for the winning ticket holders!对于手持胜券的人来说,这是多好的运气啊。
4 wooly Cfpw8     
adj.毛茸茸的;糊涂的
参考例句:
  • I like the feel of this cloth and it has a warm wooly feel.我喜欢这块布的手感,它摸上去毛茸茸的很暖和。
  • He wore a brown t-shirt with jeans and a pair of shoes,with a wooly hat covering his hair.小贝身穿一件棕色t恤,搭配牛仔裤和皮鞋,头戴一顶盖住头发的羊毛帽子。
5 mammoth u2wy8     
n.长毛象;adj.长毛象似的,巨大的
参考例句:
  • You can only undertake mammoth changes if the finances are there.资金到位的情况下方可进行重大变革。
  • Building the new railroad will be a mammoth job.修建那条新铁路将是一项巨大工程。
6 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
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