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。
The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
水边的芦苇在夜晚披上寒霜,月色清冷,山色苍茫
"All the other children at my school are stupid. Except I’m not meant to call them stupid, even though this is what they are."