And finally, the sheer volatility of prices over the past 18 months has made it very difficult for mining companies to plan.

最终，过去18个月的剧烈价格波动使得矿业公司难以作出计划。

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And finally, the sheer volatility of prices over the past 18 months has made it very difficult for mining companies to plan.

最终，过去18个月的剧烈价格波动使得矿业公司难以作出计划。

youdao