The postal industry is considered to be the natural monopoly industry traditionally.

邮递业在传统上被认为是自然垄断产业。

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The characteristic of the natural monopoly of the latest definition is the cost subadditivity.

最新定义的自然垄断的特点是代表性企业成本函数的弱增性。

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Practice attempting to totally abandon the natural monopoly theory has already been proved wrong too.

试图完全抛弃自然垄断理论的实践已被证明是错误的。

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The railway involves a natural monopoly: the only other way of getting to the ruins is a four-day hike along the Inca Trail.

ECONOMIST: The battle to reach Machu Picchu

Yesterday the state natural gas monopoly, Gazprom, signed a deal to take control over the country's largest foreign investment, the massive Sakhalin II Gas Complex in the Russian Far East.

NPR: Russia's Putin Makes Trip to Neighboring Ukraine

The network effect of eBay might seem like a natural monopoly in the making.

ECONOMIST: eBay