A proof that P = NP would have profound implications for mathematics, cryptography, and algorithm design.
孔子说:“外表威严而内心怯懦的人,用小人作比喻,就象挖墙洞的小偷吧!”
生活的美在于它的不可预测性;正是这一点让它值得活下去。
The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to go to war with one another.