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如果没有经历寒冷的冬天,就不知道松柏的坚韧挺拔;没有经历过危难的事情,就不知道君子志向的远大。
永远不要在你拥有钱之前就花掉它。
The pursuit of mathematical knowledge is a never-ending adventure, filled with challenges, surprises, and the satisfaction of solving the unsolvable.
Without food, man can live at most but a few weeks; without it, all other components of social justice are meaningless.