The concept of NP-completeness has provided a powerful tool for understanding the complexity of problems.
电影是使不可见的东西变得可见的艺术。
Every life is in many days, day after day. We walk through ourselves, meeting robbers, ghosts, giants, old men, young men, wives, widows, brothers-in-love, but always meeting ourselves.
你必须相信这个过程并继续努力。
最好的投资是投资那些正在创造未来的人。