Ted英语演讲:George Dyson:计算机的诞生
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奥巴马每日发言Weekly Address(2009.8.15)
Remarks of President Barack Obama Weekly Address Saturday, August 15th, 2009 This week, I’ve been traveling across our country to discuss health insurance reform and to hear directly from folks like y
TED演讲之寻找真理:科学可以回答道德问题(2)
And if we're more concerned about our fellow primates than we are about insects, as indeed we are, 如果和昆虫做比较,我们比较关心我们自己的物种 it's because we think they're exposed to a greater range of potent
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President's Radio Address
March 17, 2007 THE PRESIDENT: Good morning. In times of war, Congress has no greater obligation than funding our war fighters. And next week, the House will begin debate on an emergency war spending b