As a culture, we have trivialized what is actually the defining decade of adulthood. 作为一种文化，我们把实际上是成人期中最重要的一个十年列为不重要的东西。 Leonard Bernstein said that to achieve great things, you need a plan and not qu
I'm here today to talk about the two ideas that, at least based on my observations at Khan Academy, 今天，我要分享两个观点，至少基于我对可汗学院的观察得出的， are kind of the core, or the key leverage points for learning. 有关于学习的核
December 27, 2007 9:55 A.M. CST THE PRESIDENT: Laura and I extend our deepest condolences to the family of Benazir Bhutto, to her friends, to her supporters. We send our condolences to the families of
Fellow Citizens:About to undertake the arduous duties that I have been appionted to per form by the chooice of a free people, 同胞们：即将承担通过自由民众的选择而指定我来执行这艰巨责任， I avail myself of this customary and solemn
