October 15, 2007 THE PRESIDENT: One of the reasons I've stopped by this facility here in Arkansas is to remind people that business is the backbone of our economy. These good folks are making a living
How about the next question? This is asking about what the average age is, 那么下一个问题呢？这是问关于年龄的中位数， so the age at which half the population are younger and half the population are older. 也就是该地区大于和小于这个年龄的
As the Steelers and Cardinals faced off in Tampa, congressmen and senators from the teams home states crossed party lines – and team loyalties – to join President Obama at the White House.
Thank you so much for that, Helen. As you know, there's another speaker here with us that works in your same field. 感谢您的演讲，海伦。今天还有另一位演讲者，她和您在相同的领域里做研究。 She comes at it from a different perspective. Es
