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Apr. 30, 2009

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http://www.xawb.com/gb/news/2005-08/26/content_646745.htm
http://zhidao.baidu.com/question/263990.html
http://baike.baidu.com/view/1499547.htm
http://tech.sina.com.cn/d/focus/2009EarthHour/
http://earthhour.wwfchina.org/about/cn:zh-Hans
http://baike.baidu.com/view/3198.htm
http://baike.baidu.com/view/25178.htm