"The beauty of computational complexity lies in its ability to classify problems based on their inherent difficulty."

The propensity to truck， barter， and exchange one thing for another is common to all men， and to be found in no other race of animals.

正因为当初对未来做了太多的憧憬，所以对现在的自己尤其失望。生命中曾经有过的所有灿烂，终究都需要用寂寞来偿还。