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。
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。
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。
She tells us that her school has three uniforms (though all are variations on the track suit), which cost RMB480 altogether.
他告诉我们，学校共发了三套校服(都是运动服风格的)，一共480元。
She tells us that her school has three uniforms (though all are variations on the track suit), which cost RMB480 altogether.
他告诉我们，学校共发了三套校服(都是运动服风格的)，一共480元。
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