Weekly Address: Fighting for Trade Deals that Put American Workers First (April 25, 2015) 奥巴马每周电视演讲：为把员工放在首位的贸易协议而努力 Hi, everybody. I’ve talked a lot lately about why new trade deals are importa

So here, you're going to see some simulated robots. 这里，你们可以看到一些模拟机器人。 So the simulated robot has a motion rule, which is how it traverses through the structure, looking for a place to fit in, 模拟机器人有自己

How much? Enough to get us to the Global Goals? 我们要取得多少进步来到达全球目标呢？ Well, let's look at some numbers. 咱们来看看这些数字。 What we know already: the world today is scoring 61 on social progress, and the place we

Hello, everybody. In our house, everybody knows that President is only the third-most important job in the family. So this weekend, I'm going to take a little extra time to say thank you to Michel

The young men of the country those who from their age must be its rulers twenty five years hence 美国青年——25岁以后将成为国家的领导者 have a peculiar interest in maintaining the national honor. 特别关心维护国家荣誉。 A moment&#