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President Obama holds a town hall meeting with Young African Leaders from over 50 countries about the future of Africa in an interconnected world and the role of the United States as a partner with Af
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Michelle and I are saddened to learn of the passing of Steve Jobs. Steve was among the greatest of American innovators—brave enough to think differently, bold enough to believe he could change t
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奥巴马演讲 Protecting the Gulf for Our Grandchildren 1
THE PRESIDENT: Good afternoon, everybody. I just had to -- a chance to tour this staging facility here at Theodore along with Admiral Allen and Governor Riley. I also want to acknowledge that Congress
TED演讲:游戏创造美好生活(10)
Let's get half of us to agree to spend an hour a day playing games, 让我们中一半的人每天玩游戏一小时 until we solve real-world problems. 直至我们可以去解决现实生活中的问题 Now, I know you're asking, "How are we going to