The wisdom of hindsight, so useful to historians and indeed to authors of memoirs, is sadly denied to practising politicians.
后见之明对历史学家乃至回忆录作者非常有用,但遗憾的是,实践中的政治家却无法拥有。
States are rational actors that seek to maximize their power and security in an anarchic international system.
Quantum technologies will revolutionize our world in ways we are only beginning to understand.
自然界中每年的痛苦总量超出了所有体面的思考。在我写这句话的一分钟内,成千上万的动物被活生生地吃掉,许多其他动物在逃命,因恐惧而呜咽,其他动物则被寄生虫从内部慢慢吞噬,成千上万的动物因饥饿、口渴和疾病而死亡。
在计算中,不变量是短暂的。