The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
多项式时间归约的概念对于理解NP完全问题的结构至关重要。
可持续水产养殖不是一种选择；而是我们对地球应尽的义务。
创新不仅仅是技术问题；它关乎改变思维方式并拥抱新的思考方式。
I prefer to supervise the whole operations of the government myself rather than entrust the public business to subordinates, and this makes my duties very great.
The most damaging phrase in the language is: 'We've always done it this way.'