THE PRESIDENT: Hello, hello! How are you? Thank you, everybody. Thank you very much. (Applause.) Thank you so much, everybody. Please have a seat. Welcome to the White House. And congratulations, a li
16.The Democratization of Education---Commencement Address by Shakira Isabel Mebarak Ripoll at Oxford University 16.教育的民主化——哥伦比亚女歌手夏奇拉在牛津大学的演讲 I have a fantasy about this future that I want to share w
奥巴马在本周的视频演讲中，分享了他自己作为父亲的亲身经历，讨论了如何才能成为一个好父亲，为所有的父亲献上节日祝福。 2011-06-18 奥巴马每周视频演讲：父亲节祝福 Hi, everybody. This Father’s Day weekend, I’d like to spend a couple minutes talking about what’s sometimes my hard
So here's a great puzzle: in a universe ruled by the second law of thermodynamics, 所以，这就是个大谜团：在宇宙中，在被热力学第二定律规范下， how is it possible to generate the sort of complexity I've described, 怎么样才有可能产生这种我刚才论述的
