我学得越多，就越意识到自己不知道的还有多少。
P与NP问题是计算机科学中最重要的一个问题之一。
A story is a letter that the author writes to himself, to tell himself things that he would be unable to discover otherwise.
The novel is a mirror carried along a high road.
The beauty of computational complexity lies in its ability to classify problems based on their inherent difficulty.