All kinds of main relationship between natural technology conditions and coal cost are analysed, and the influence degree of cost variations resulted from the influence factors is determined.

分析了各种主要的自然技术条件与原煤成本变化的关系，由此确立了各影响因素对成本变化的影响程度。

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The poverty indicator does not account for programmes that help the poor, such as the earned-income tax credit, nor does it adjust for regional variations in the cost of living.

贫穷指标没有将帮助穷人的项目包含在内，比如收入税收抵免，也没有为生活成本的地区不同而作调整。

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For these reasons, and because of the additional time and cost involved in taking such variations into account, people often avoid using females in their research.

出于这些原因，并且还要考虑增加的时间和成本，人们往往在他们的研究中避免使用雌性小鼠。

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At relatively low cost, Ford built dressier variations of Ford and sold them as Mercurys, and in large volume.

FORBES: Magazine Article

The poverty indicator does not account for programmes that help the poor, such as the earned-income tax credit, nor does it adjust for regional variations in the cost of living.

ECONOMIST: The world��s richest country tries to count its poor

Apart from scooping up Daihatsu to get small-car engineering and engines years ago, Toyota has concentrated solely on improving its own offering, with a relentless focus on efficiency, cost-cutting and a flood of new variations of successful models brought to market at an increasingly rapid rate.

ECONOMIST: The global car industry