如果你不愿意学习，没人能帮你。如果你决心学习，没人能阻止你。

每一个词都是选择，而每一个选择都是牺牲。

Failure gave me an inner security that I had never attained by passing examinations. Failure taught me things about myself that I could have learned no other way. I discovered that I had a strong will, and more discipline than I had suspected; I also found out that I had friends whose value was truly above the price of rubies.

形式语言和自动机的研究对于理解计算机科学的理论基础至关重要。