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生存的规则永远不会改变,无论你是在沙漠中还是在市中心的街道上:你需要水分,你需要食物,你需要庇护所。
Mathematics is the most beautiful and most powerful creation of the human spirit.
真相很少是纯粹的,也从来不简单。
"It is impossible to go through life without trust: that is to be imprisoned in the worst cell of all, oneself."