You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" 你知道，在中世纪的英国，当你遇见一个非常穷苦的人，你会认为他“不走运”， literally, somebody who had not been
John F. Kennedy: Civil Rights Address Delivered 11 June 1963 Good evening, my fellow citizens: This afternoon, following a series of threats and defiant statements, the presence of Alabama National Gu
President Obama discusses the steps he is taking to make America competitive in the short and long terms, and why he chose GE CEO Jeff Immelt to head up the new Council on Jobs and Competitiveness. He
So here, you're going to see a thousand robots that are working together to self-assemble the letter K. 这里你们可以看到一千个机器人合作自发组成字母K。 The K is on its side. And the important thing is that no one is in char
On this Memorial Day, as our nation honors its unbroken line of fallen heroes, our sense of patriotism is particularly strong. Because while we gather here under open skies, we know that far beyond th
