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在最低阶层中保存知识的手段对公众来说比国家中所有富人的所有财产都更重要。
The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of all the rich men in the country.
When you borrow a man's car, always return it with a tank of gas.
穷人面临的约束往往是政策制定者看不到的。