That's why when, in California, we try to deal with all the solar we've brought online 这就是为什么在加州，我们正在尝试太阳能的完全使用， we now get about 10 percent of electricity from solar 我们现在能够从太阳能获得大约10%的电力， when the su

THE PRESIDENT: Hey! Hello, Phoenix! (Applause.) Hello, Arizona! (Applause.) It is -- AUDIENCE MEMBER: We love you, Obama! THE PRESIDENT: I love you back. It is good to be here. (Applause.) I want to s

Just think about what that must have been like for those young men. 试想一下那些年轻人的经历。 Here they were, trained to operate some of the most complicated, high-tech machines of their day 他们在这里接受训练操作当时最复杂的高科技飞

And even though we might help them achieve some short-term wins by overhelping 即使我们可以通过这种过度帮助来让他们获得一些短期的成功 like they get a better grade if we help them do their homework, 比如帮他们做作业而拿到的好成绩， they might e

And isn't that part of what so often makes politics dispiriting? 不正是这些因素使人们对政治感到失望的吗？ How can elected officials rage about deficits when we propose to spend money on preschool for kids, but not when w