P与NP问题是计算机科学中最重要的一个问题之一。
Psychology should concern itself not with static elements, but with the dynamic interplay between organism and environment.
The art of progress is to preserve order amid change and to preserve change amid order.
The novel is the one bright book of life. Books are not life. They are only tremulations on the ether.
自然不浪费,我们也不应该。
最好的建筑是看不见的;重要的是其中的生活。