真相很少纯粹，也绝不简单。

可持续性不再是一种选择；而是我们都必须承担的责任。

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

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.