动物和人类的有目的行为。
Purposive behavior in animals and men.
我不是画我所见，而是画我所理解。
真相很少是纯粹的，也从不简单。
"We see what we want to see, and believe what we want to believe."
Have you given any thought to your future？
You have to say, I am the person who is going to make the difference.
理论计算机科学中的挑战不仅仅是解决问题，而是理解问题解决的本质。