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。
Every problem in NP can be reduced to the satisfiability problem, which is the cornerstone of computational complexity theory.
生命短暂，让它变得甜蜜取决于你。
People can cry much easier than they can change.
The only real failure in life is not to be true to the best one knows.
I'm not here to fit in, I'm here to stand out.