A WORLD THAT STANDS AS ONE July 24, 2008 | Berlin, Germany Thank you to the citizens of Berlin and to the people of Germany. Let me thank Chancellor Merkel and Foreign Minister Steinmeier for welcomin

But this question lingers and I continued to be troubled by the unequal distribution of scientific knowledge throughout the world. 但这个问题仍旧萦绕着我，我依旧会被世界上科学知识的分布不均衡问题所困扰。 We have learned to edit the huma

The Gettysburg Address by President Lincoln Fourscore and seven years ago, our fathers brought forth upon this continent a new Nation, conceived in Liberty, and dedicated to theproposition that all me

Now here, I want to share the stage with someone quite special. Right? 现在，我想与一位有些特别的人共享这舞台。可以吗？ She was one of the young people who was involved in this study, and she's now one of the youngest publis

THE PRESIDENT: The 4th of July is fast approaching, and Democratic leaders in Congress have scheduled another recess. Americans are concerned that Congress may leave town with a lot of important busin