Whether it is oil, corn, iron ore, coal, cotton or copper, prices are falling quickly.

不管是石油、玉米、铁矿石、煤炭、棉花还是铜，价格都在快速下跌。

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The stone material is selected from limestone, diabase, basalt, copper ore, iron ore, or their mixture;

其中，石料可选择石灰岩、灰绿岩、玄武岩、铜矿石、铁矿石等物质或其混和物；

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Silver and copper are smaller markets, but their adherents argue that the industrial demands for the shiny stuff by nations that must build out their infrastructure products such as the fast speed transportation system in China or the ports of India, Thailand another emerging markets clearly suggest a shortage of silver and copper, possibly iron ore as well.

FORBES: Smart Money Is Long Gold, Silver, Copper, Oil And Zero Coupon Treasuries