A natural monopoly exists when the optimum size for a firm in some area of production is so large that there is room for only one such firm on the market.
当一些特定领域的生产使得只能有一个企业达到它的最佳规模时，自然垄断就产生了。
A natural monopoly exists when the optimum size for a firm in some area of production is so large that there is room for only one such firm on the market.
当一些特定领域的生产使得只能有一个企业达到它的最佳规模时，自然垄断就产生了。
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