储蓄率是经济发展中最具战略意义的变量。

"To write is to give oneself a chance to live many lives."

最好的电影是那些不怕模棱两可的电影。

In the end, that's what this election is about. Do we participate in a politics of cynicism or a politics of hope?

We begin with the hypothesis that any subject can be taught effectively in some intellectually honest form to any child at any stage of development.

数学的美在于它能够用一种普遍的语言来描述世界。