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最深的伤口是看不见的。
The study of computational complexity is not just about classifying problems; it is about understanding the nature of computation itself.
The freedom then of man, and liberty of acting according to his own will, is grounded on his having reason, which is able to instruct him in that law he is to govern himself by, and make him know how far he is left to the freedom of his own will.
管理复杂性的关键在于关注组件之间的接口,而不是它们的实现。