The world is not a wish-granting factory.
计算复杂性理论的发展向我们展示了并非所有问题都是平等的。
始终保持你的刀锋利,你的智慧更锋利,你的精神最锋利。
We are at a unique stage in our history. Never before have we had such an awareness of what we are doing to the planet, and never before have we had the power to do something about it.
The best way to design a program is to design it.