我不是情感，我是理念。

We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.

光明在书中。把书完全打开，让它发光，让它发挥作用。

一个毁坏土壤的国家就是在毁灭自己。森林是我们土地的肺，净化空气并给我们的人民以新的力量。

可持续性不再是可选项，而是任何想在21世纪蓬勃发展的企业的必需品。