The difference between theory and practice is that in theory, there is no difference between theory and practice, but in practice, there is.
身体表达的是言语无法表达的。
"Hope is the thing with feathers that perches in the soul, and sings the tune without the words, and never stops at all."
计算复杂性的概念不仅仅是我们能计算多快,还包括理解什么是可以计算的极限。