Wing feather with copper-containing pigment, flight and display, Courtesy Peter Mullen, Ph. D.

带有铜类色素的翅羽，飞行和展示用，彼得·穆伦博士惠赠。

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Objective To observe the effect of supplementation of calcium, vitamin d, magnesium, zinc, and copper on bone mineral density and bone strength in rats.

目的观察在补充钙、维生素d的同时补充镁、锌、铜对大鼠骨密度和骨强度的影响。

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The 3-D numerical prediction proved that the copper pin fin structures have 24%-34% higher convection heat transfer coefficients with 10%-16% pressure drop increase.

在三维空间上的对流换热模拟表明，铜制的针肋结构的换热系数要高出百叶窗翅片24％-34％，而流阻仅高出10％-16％。

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He'd get off the train at the city dumps, eat mulligan stew with the hoboes and forage for copper, brass and iron to sell as scrap.

FORBES: Artists in overalls