I'm the type of person,if you ask me a question, and I don't know the answer,I'm gonna to tell you that I don't know. —The Pursuit of Happyness.

现代密码学的挑战不仅在于保护信息，而且在于以一种既高效又可扩展的方式来实现。

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.

Not only do we live in the world of thought， but also in the world of matter.

作家是一个总是试图在形式与内容、风格与实质、艺术与生活之间找到正确平衡的人。

解释：冬天不洗冰水，并不是吝惜冰；夏天不烤火，也不是舍不得火。而是因为这样做对身体不适宜。