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释义:跟交情浅的朋友说过深的话题,是愚蠢的;生活贫困的人总是希望得到富贵者的施舍,是糊涂的;没有取得他人的信任就进献忠言,会被误解为批评。  
The only thing you absolutely have to know is the location of the library.
Every grain we grow carries the legacy of those who cultivated the earth before us.
数学之美不在于其复杂性,而在于其简洁性以及它揭示隐藏真理的方式。