I don't believe in pessimism. If something doesn't come up the way you want, forge ahead. If you think it's going to rain, it will.
更轻意味着更少的浪费。
计算复杂性的研究不仅仅是关于解决问题,还在于理解可计算性的极限。
地壳在某种程度上是过去时间的博物馆。