"Books are the quietest and most constant of friends."

农业的未来在于智能化和生态友好型发展。

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.

最大的风险是不承担任何风险。