All you need to do is cut a lemon in half and place each piece on both spikes of copper and zinc and you're good to go.

你需要做的只是将一个柠檬切成两半，一半放在铜钉上，另一半放在锌钉上，这样就可以了！

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David Heydon, the boss of Nautilus, says that his firm's underwater samples, which are literally cut and lifted off the sea floor, contain 10% copper.

鹦鹉螺公司老板大卫•海冬说，他们公司开掘并运出海底的水下样品却包含百分之十的铜。

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As housing sales fall and developers cut back on new projects, demand for the steel, cement and copper that go into new buildings has weakened.

随着房屋销售的下滑以及开发商纷纷削减新建项目，建筑用钢材、水泥和铜的需求走软。

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However, the benefit from high copper prices could be mitigated if manufacturers choose to substitute aluminum for copper to cut costs.

FORBES: Costly King Copper Could Turn Freeport Into A Pauper

Managed-money accounts are still reducing their net-long position in copper, having cut gross longs and added gross shorts.

FORBES: FOCUS: Speculators Return To Gold Market -- CFTC Data

The company cut its full-year copper production outlook in response to continued disruptions in its cash-cow, the Grasberg mine.

FORBES: Freeport McMoran Beats Despite Plummeting Copper And Grasberg Strike