Now we're not here for that long anyway, 虽然不管怎样我们不会在此地待多长时间， but to spend almost half of our life lost in thought and potentially quite unhappy, I don't know, 但耗费大半人生迷失在思考中并因此可能变得非常不幸福，我不知道， it just k

My fellow Americans, This is a season of great hope. This week, Jewish families across our country and around the world, celebrate Passover and retell the story of God's deliverance of the Jewish

THE PRESIDENT: Good morning. On Monday night, I will address the American people about the state of our union. I will report that over the last seven years, we've made great progress on important issu

8:01 P.M. EST THE PRESIDENT: Fellow citizens: For eight years, it has been my honor to serve as your President. The first decade of this new century has been a period of consequence -- a time set apar

Here's how shape works in normal receptors. 这里展示的是形状是如何对通常的感受器起作用的。 You have a molecule coming in, it gets into the protein, which is schematic here, 一个分子进来，进到蛋白质里，图中所示意的就是蛋白质， and it causes this thin