能者做事，不能者教书。

Leadership is about making tough decisions today that will benefit future generations.

我们要加强国际合作，共同应对能源安全和气候变化的挑战。

"Failure is a part of the scientific process, and it's important to learn from it and move forward."

数学家最好的工作往往来自于在别人看不到联系的地方发现联系。

我努力过一种没有遗憾的生活。这是真正自由的唯一途径。

The choice for mankind lies between freedom and happiness and for the great bulk of mankind, happiness is better.