In chapter 2, based on analysis of energy conversion relation and efficiency of moving-iron type electromechanical converters, several methods for reducing power consumption are summarized.

第二章基于动铁式电-机械转换器的功能转换关系及其效率分析，概述了多种降低功耗的方法；

youdao

It does not cost much to scrape it up, and the expense comes in moving costs from mine to market. Even so, Australia can produce iron ore for $25 a tonne.

开采成本本身不高，而且外部投资正在将成本从矿山转移到市场。即便如此，澳大利亚可以以每吨25澳元的价格成本生产铁矿石。

youdao

Was it possible that the problem had been that they had stopped to rest each time after moving the iron box only a short distance?

问题是有可能在他们每次只搬动那铁箱子一段很短的距离就停下来休息而造成吗？

youdao

The World Steel Association, a steelmakers' group, predicted early this month that the iron-ore market should stay balanced this year before moving into progressive surplus between 2014 and 2017 as new mine capacity comes on stream.

WSJ: Court Eases Mining Ban in Karnataka