Since labor and land are important inputs into the production of Big Macs, these differential costs feed through into the final cost of the burger.

由于劳动力和土地是生产巨无霸的重要投入，由此造成的成本差异会体现在巨无霸的最终成本上。

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Good high schools can cost $3,000 for three years, and a high-school-age laborer can earn $150 a month; that’s a cost differential of about $8,400—a fortune for poor peasant families.

在好的高中上3年学，可花去3000美元，而高中适龄劳动者可以赚取每月150元，这是一个约8,400元的成本差异，这对贫苦农民家庭是一笔不小的数目。

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The cost differential between fossil-fuel-generated energy and some alternatives is already small, and is likely to come down.

化石燃料产能同某些替代途径产能在成本上的差距已经很小，而且可能会继续缩短。

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The cost differential is driven by air pollution, interconnection and the economics of fuel efficiency.

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Otherwise, margin increase would come from offering an equivalent level of service at a better production-to-retail cost differential.

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Some of that cost differential could be offset by higher productivity and greater labour flexibility in western countries.

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