这种指数通过对进口铁和国产铁矿石取以加权平均价格以此产生一个合成数。

The index works by taking a weighted average of the price of imported iron and domestically produced iron ore to produce a composite number.

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同时钢厂进口的铁矿石原材料的价格在上半年上涨了将近50%，进一步挤压利润空间。

Meanwhile the price of the iron ore the steelmakers import as their core ingredient rose by nearly 50% in the first half of the year, squeezing margins.

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由于价格上涨促进钢铁制造商的生产与原材料购买，6月份铁矿石进口上升了3.4%，为本年度第二大值。

Iron ore imports rose 3.4 percent in June to the second-highest level this year, as rising prices prompted steelmakers to produce more and buy more raw materials.

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