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**[Sarah Graham ý Scientific
American ¦ºö¾¢ìÌÈ¢ôÀ¢¨É ÓüÚÓüÈ¡¸ò ¾ØÅ¢ÂÐ.
http://www.sciam.com/news/062801/1.html
http://www.nature.com/nature/news/010628.htm]l
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