The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
我相信爱的力量。
我不害怕死亡，我只是不想在那一刻在场。
我不认为建筑是为了解决问题，而是为了创造机会。
The true measure of a farmer's success is not just yield per acre, but the legacy left for future generations.
生活中最重要的事情是快乐。
"To be Irish is to know that in the end the world will break your heart."