Workers are removing impurities from silver.

工人们正去除银中的杂质。

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Workers are removing impurities from silver .

工人们正去除银中的杂质。

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Refining, like smelting, is a process of removing impurities from a raw material.

与冶炼矿石一样，石油提炼是一个从未加工的原料中除去杂质的过程。

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Phosphate is mined in several parts of China, and removing impurities like cadmium and uranium is expensive.

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One reason it is especially smooth is because it is triple distilled, using a mix of traditional pot stills and modern column stills, and like Jack Daniels here in the States, it is made from local spring water and filtered through charcoal after distillation, removing additional impurities.

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