"Mr Speaker, Mr Vice President, Members of Congress, first lady of the United States, and my fellow Americans, 议长先生、副总统先生、各位国会议员，美国第一夫人和我的美国同胞们： less than one year has passed since I first stood at th

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

For instance, why may not any portion of a new confederacy a year or two hence arbitrarily secede again, 比如说，一个新的联盟的任何一部分，在一两年之后， precisely as portions of the present Union now claim to secede from it

I remember the first time I saw Robert De Niro up on screen. I was 13 years old and despite what I learned career day. I discovered that acting was in fact a profession. My father and I went to see Mi

Jill Bolte Taylor's Powerful Stroke of Insight 吉尔伯特泰勒的奇迹 I grew up to study the brain because I have a brother who has been diagnosed with a brain disorder: schizophrenia. And as a sister and later, a