煤炭行业不仅仅是挖掘地面，更是为未来提供动力。

心理学必须建立在直接经验和内省的基础上。

A building must be both strong and gentle.

投资的本质是把资本配置到最有效率的地方。

And I hope you will come back here to Harvard 30 years from now and reflect on what you have done with your talent and your energy. I hope you will judge yourselves not on your professional accomplishments alone, but also on how well you have addressed the world's deepest inequities…on how well you treated people a world away who have nothing in common with you but their humanity.