单词：polyploid perse
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By David Gollust State Department 20 December 2007 U.S. Secretary of State Condoleezza Rice Thursday hailed Canada's military role in Afghanistan and said defeating the Taliban-led insurgency there is crucial to international security. Rice met Canad
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77 流星雨成因探索 Date=8-2-01 Ttle=science report - the Perseid meteor shower Bline=Mario Ritter （Start at 59
科技之光
By Derek Kilner Nairobi 10 December 2007 The United Nations marked the anniversary of the adoption of the Universal Declaration of Human Rights in Nairobi by highlighting the persecution of journalists in Somalia. Derek Kilner has more for VOA from N
VOA常速英语2007年（十二月）
A dramatic supermoon is set to accompany this years Perseid meteor shower, one of the most anticipated events on the skywatchers calendar. 2014年度最大圆月，将和天文爱好者十分期待的英仙座流星雨同时出现。 图片1 Given a
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