Hi, everybody. 大家好。 Whether you're firing up the grill, fired up for some college football, or filling up the car for one last summer road-trip-Happy Labor Day weekend. 无论你是准备点燃烧烤炉，还是要去大学橄榄球赛场加油助威

Hearing from the Kennedy Center Honorees It's not every day, even around here, that such renowned personalities visit 1600 Pennsylvania Avenue. On Sunday, the President and First Lady hosted a recepti

So this is just one experiment that we published a few years ago,where a monkey, without moving its body,learned to control the movements of an avatar arm,a virtual arm that doesn't exist. 那么这只是我们

Remarks of President Barack Obama – As Prepared for Delivery Signing of Stem Cell Executive Order and Scientific Integrity Presidential Memorandum Washington, DC March 9, 2009 Today, with the Executiv

If you had caught me straight out of college in the halls of the Vermont State House 如果你在我本科刚毕业后在佛蒙特州议会大楼里遇到我 where I was a lobbyist in training and asked me what I was going to do with my life, 那时我还正