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SSS 2011-03-22

时间:2011-04-27 05:38来源:互联网 提供网友:geologyforget   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 Cynthia Graber. This will just take a minute.

X rays are so common today you probably never stop to think about them. They help check a broken wrist, a sprained1 ankle, the state of our teeth. But a little more than a century ago, x ray machines provided a revolution in medicine, allowing doctors to look inside the body. And now scientists in the Netherlands have gotten a chance to look at how the original technology functioned.

A first-generation anatomical imaging x ray machine was built in the Netherlands in early 1896. Advances to the technology came quickly, and that first machine was relegated2 to an old warehouse3. Then a year ago, a Dutch radiologist got his hands on the machine and dusted it off. He and a colleague tested it using a cadaver4 hand. They published their research in the journal Radiology.

They found that an x ray image that requires just 21 milliseconds today would have taken 90 minutes in 1896. And the radiation exposure would have been 1,500 times greater than modern technology’s. Early x ray operators and researchers thus often suffered burns and other maladies. The scientists wrote that the images they produced with the ancient machine were severely5 blurred—but still awe-inspiring.

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


点击收听单词发音收听单词发音  

1 sprained f314e68885bee024fbaac62a560ab7d4     
v.&n. 扭伤
参考例句:
  • I stumbled and sprained my ankle. 我摔了一跤,把脚脖子扭了。
  • When Mary sprained her ankles, John carried her piggyback to the doctors. 玛丽扭伤了足踝,约翰驮她去看医生。
2 relegated 2ddd0637a40869e0401ae326c3296bc3     
v.使降级( relegate的过去式和过去分词 );使降职;转移;把…归类
参考例句:
  • She was then relegated to the role of assistant. 随后她被降级做助手了。
  • I think that should be relegated to the garbage can of history. 我认为应该把它扔进历史的垃圾箱。 来自《现代汉英综合大词典》
3 warehouse 6h7wZ     
n.仓库;vt.存入仓库
参考例句:
  • We freighted the goods to the warehouse by truck.我们用卡车把货物运到仓库。
  • The manager wants to clear off the old stocks in the warehouse.经理想把仓库里积压的存货处理掉。
4 cadaver usfzG     
n.尸体
参考例句:
  • Examination of a cadaver is to determine the cause of death.尸体解剖是为了确认死亡原因。
  • He looked down again at the gaping mouth of the cadaver.他的眼光不由自主地又落到了死人张大的嘴上。
5 severely SiCzmk     
adv.严格地;严厉地;非常恶劣地
参考例句:
  • He was severely criticized and removed from his post.他受到了严厉的批评并且被撤了职。
  • He is severely put down for his careless work.他因工作上的粗心大意而受到了严厉的批评。
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