As well as oil and food, metals prices have been soaring: the price of copper hit a series of record highs this week.

金属、油和食品价格一直飞涨：本周铜价创一系列历史最高。

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The process of heat treating is the method by which metals are heated and cooled in a series of specific operations that never allow the metal to reach the molten state.

金属热处理过程其实是一系列具体的操作，通过这些操作加热与冷却金属，但加热时进行控制，使得金属不达到熔融的状态。

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These metals were chosen because they lie towards opposite ends of a chemical series called the Irving-Williams series, such that selecting these metals for proteins should be especially demanding.

选择铜锰进行研究是因为它们位于欧文·威廉姆斯化学序列的对立两方，选择这些金属的蛋白应当有特定需求。

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But it occurs to me that one of the effects of the adoption of thorium technology would be to make a series of other metals, like tantalum and the rare earths, rather cheaper.

FORBES: An Odd Thought: Thorium Reactors Would Make Tantalum And Rare Earths Cheaper

In 2009 Rio Tinto, an Anglo-Australian mining firm, withdrew from a deal to sell a series of minority stakes to Chinalco, a Chinese metals firm.

ECONOMIST: What it feels like to be bought by a Chinese firm