New copper-extracting technologies can use up to 40 percent less electricity than the older method to process the same amount of raw ore, especially when the proportion of copper in the ore is high.

在处理同等数量矿石原料的情况下，尤其是当铜在矿石中的含量很高时，新的采铜工艺可比旧式工艺少用40%的电力。

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Raw material cost keep accounting for the high proportion of the total cost.

原料采购成本占企业总成本的比重居高不下。

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