英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语

SSS 2009-01-15

时间:2010-05-17 02:42来源:互联网 提供网友:木渐浅。   字体: [ ]
特别声明:本栏目内容均从网络收集或者网友提供,供仅参考试用,我们无法保证内容完整和正确。如果资料损害了您的权益,请与站长联系,我们将及时删除并致以歉意。
    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute?

 

Forget the scalpel, researchers at Johns Hopkins University have created a tool that can move easily through tissue, potentially making biopsies much less invasive. They call it a "microgripper." And the wireless1, dust-particle sized device is able to grab single living cells from hard-to-reach places. Their report appeared in the online early edition of the Proceedings2 of the National Academy of Sciences.

 

The researchers assembled out of tiny metallic3 plates a "palm" with six three-jointed "fingers." This metal hand is truly tiny: just one-tenth of a millimeter in diameter. In the lab, scientists used magnets to pilot the microgripper through a tube of animal tissue and up to a living cell. Then, by applying heat as a trigger, the joints4 softened5 and the "fingers" closed around the cell.

 

The researchers hope the device will have applications beyond cell retrieval. It could be used to manufacture microchips or deliver medicine to specific locations in the body. But first, they must refine its motor skills. Right now, the microgripper can only grab—it can’t let go. And we're still years away from shrinking Raquel Welch to go in after it.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Adam Hinterthuer.

 


点击收听单词发音收听单词发音  

1 wireless Rfwww     
adj.无线的;n.无线电
参考例句:
  • There are a lot of wireless links in a radio.收音机里有许多无线电线路。
  • Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。
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 metallic LCuxO     
adj.金属的;金属制的;含金属的;产金属的;像金属的
参考例句:
  • A sharp metallic note coming from the outside frightened me.外面传来尖锐铿锵的声音吓了我一跳。
  • He picked up a metallic ring last night.昨夜他捡了一个金属戒指。
4 joints d97dcffd67eca7255ca514e4084b746e     
接头( joint的名词复数 ); 关节; 公共场所(尤指价格低廉的饮食和娱乐场所) (非正式); 一块烤肉 (英式英语)
参考例句:
  • Expansion joints of various kinds are fitted on gas mains. 各种各样的伸缩接头被安装在煤气的总管道上了。
  • Expansion joints of various kinds are fitted on steam pipes. 各种各样的伸缩接头被安装在蒸气管道上了。
5 softened 19151c4e3297eb1618bed6a05d92b4fe     
(使)变软( soften的过去式和过去分词 ); 缓解打击; 缓和; 安慰
参考例句:
  • His smile softened slightly. 他的微笑稍柔和了些。
  • The ice cream softened and began to melt. 冰淇淋开始变软并开始融化。
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎点击提交分享给大家。
------分隔线----------------------------
TAG标签:   SSS  metallic
顶一下
(0)
0%
踩一下
(0)
0%
最新评论 查看所有评论
发表评论 查看所有评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:
听力搜索
推荐频道
论坛新贴