Xstrata's skill has been in buying lower-quality mines and running them more efficiently.

斯特拉塔手法就是购进低质量的矿产，然后把它们进行高效的运作。

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Authorities there claim that many gold mines can not work profitably with lower prices.

南非官方宣称，因为金价下跌，许多金矿无法赢利。

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In underground coal mines, Rayleigh wave method was used to detect lower coal seam and structures ahead roadways and produced satisfactory results.

在井下用瑞利波方法探测下部煤层、超前探测煤巷、岩巷前方的构造，取得了满意的效果。

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To do so, some of the steps the firm will take will be to identify what works well in higher-performing mines and apply them as possible in lower-performing mines.

FORBES: Kinross: Main Focus Will Be On Increasing Margin And Prioritizing Cash Flow

Xstrata's skill has been in buying lower-quality mines and running them more efficiently.

ECONOMIST: Xstrata and Glencore

Projected operating costs are expected to be lower than other mines because metals are closer to the surface, Begic said, with platinum assets about 80 meters below the surface.

FORBES: Platinum Group Metals Targets 2013 For South African Mine Start