Some mining companies seem reassured.

一些矿业公司似乎并不担忧。

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Mining companies climbed with commodity prices.

大宗商品价格上升，推动矿业个股走高。

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Other big mining companies helped with advice and equipment.

另一家大型的矿业公司协助提供建议和设备。

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In a few years, almost all of the gold from Colorado came from the mining companies.

VOA: special.2009.05.28

Then they began to die. In some of the gold centers, big mining companies bought up all the land from those who first claimed it.

VOA: special.2010.03.18

International mining companies and industry analysts warn,however, that gold production will not meet demand in the next few years.

VOA: standard.2010.07.21

Silver Wheaton has long-term contracts with other mining companies to buy silver at very cheap prices.

FORBES: Perceptions Of Silver Changing Dramatically

Cost inflation for mining companies is likely to rise further this year, Meader said.

FORBES: Silver Institute: Global Silver-Mine Output Rises 4% To Record High In 2012

Cummins blamed the weak results on little demand from oil, gas and mining companies.

FORBES: Cummins Hurt By Oil, Gas And Mining Slowdown; Q1 Profit Down 38%