求翻译：一般进口矿的比例是持续增加的，因为现在国内的矿粉开采难度越来越大，频率越来越低，成本越来越高，而且进口矿的量这几年是增加的，包括这几年矿山一直在扩招，我们感觉进口矿整体使用的量增加。是什么意思？

Imported ore ratio is increasing, increasing the difficulty of exploitation of the ore, the frequency is getting lower and lower, the cost is getting higher and higher, and the amount of imported mine in recent years increased, including several The mine has been in enrollment, we feel an increase i

General Import of the mine is on the rise, as it is now home of the mine is getting more and more difficult, and exploitation less frequently, increased costs, but also imports of mine is the last few years is to increase the number of years, including the mine has been enlarged, we feel the use of

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Continued increase in the ratio of imported iron ore, ore mining country now increasingly difficult, lower frequencies, is increasingly expensive, and these past few years is the increase in the volume of imported iron ore, including enlarging the enrollment of these past few years mine has been, we

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