数学是给不同事物起相同名字的艺术。

And when you do I want you to know this， remember this: there is no such thing as failure. Failure is just life trying to move us in another direction. Now when you’re down there in the hole， it looks like failure. So this past year I had to spoon feed those words to myself.

Holding an Olympic Games means evoking history.

运营卓越不仅仅是效率，更是为所有利益相关者做正确的事。