—— 请按键盘 空白键 开始游戏 ——

Every problem in NP can be reduced to the satisfiability problem, which is the cornerstone of computational complexity theory.
NP中的每个问题都可以归约为可满足性问题,这是计算复杂性理论的基石。
The greatest threat to our forests isn’t logging—it’s indifference.
我远行万里来看世界的奇迹,但真正让我惊讶的是我在旅途中遇到的人。