演讲与历史：公元前324年亚历山大大帝鼓舞军队的演讲 Depart! By Alexander the Great The speech which I am about to deliver will not be for the purpose of checking your start homeward, for, so far as I am concerned, you may dep

March 19, 2008 THE PRESIDENT: Thank you all. Deputy Secretary England, thanks for the introduction. One boss may not be here, but the other one is. (Laughter.) I appreciate your kind words. I'm please

And sort of the posterbirds for this idea are the birds up there. 图片上的鸟可以证明这个观点。 On one side is a New Caledonian crow. And crows and other corvidae, ravens, rooks and so forth, are incredibly smart bi

Fortunately, Europe had the benefit of the social safety net. It held down European growth rates in good times, but it served its purpose in the downturn and the recession in Euroland turned out to be

So at the end of my first year at Harvard, a student who had not talked in class the entire semester, who I had said, 所以我在哈佛的第一年结束的时候，我对整个学期在课堂上都没有说话的一个学生说: "Look, you've gotta participate or else you