The discovery of the accelerating expansion of the universe was a complete surprise.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

Education is the most powerful weapon which you can use to change the world.

Leadership is not about being in charge; it's about taking care of those in your charge.

全球经济中最大的未开发资源是女性的充分参与。

The boundary of technology lies in human imagination.

建筑师必须是诗人、建造者和革命者。