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Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
The tears of the world are a constant quantity. For each one who begins to weep, somewhere else another stops. The same is true of the laugh.
释义:通过分析物品的过剩与短缺,就能判断其价值的高低。这句话揭示了市场供求关系对价格的影响。