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
And the implications of this -- there are many, 这其中蕴含的--有很多意义 but one I just want to point out, is that there must be amazing feedback loops. 但是我想指出的其中的一个，就是这个过程中必定包涵了一个惊人的反馈循环 Of course, my son is le
May 5, 2008 THE PRESIDENT: Thank you all for coming. Welcome. Si ntese. (Laughter.) Laura and I welcome you to the Rose Garden for what is going to be a spectacular evening. We are so glad you are her
We all worry about our privacy settings on Facebook, but the fact of the matter is, our openness can be used against us. 我们都为我们在Facebook上的隐私设置感到烦恼，但是问题的实际情况在于，我们的坦率可能会被用来伤害我们自己。 Terrorists are doing t
