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But if inventions have increased man's power over nature very much, then the real value of money is better measured for some purposes in labour than in commodities.

但是，如果发明极大地增强了人类对自然的控制力，那么从某种意义上说，衡量金钱的真正价值，劳动比商品更有价值。

— Alfred Marshall 阿尔弗雷德·马歇尔