在计算机科学中，我们经常处理那些容易陈述但难以解决的问题。

You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.

The only thing that is truly yours is your time.

The past is a foreign country; they do things differently there.