Soil naturally contains harmless amounts of lead, along with other metals.

土壤天然含有安全量的铅及其他金属。

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This pure gold is commonly alloyed with other metals to increase its hardness and decrease its cost.

这通常是纯金合金与其他金属，以增加其硬度和降低其成本。

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Aluminium is alloyed with other metals and cast into ingots, and the surface of the ingots is smoothed off.

铝与其他金属一起被制成合金，铸成锭子，并且把锭子的表面光洁化。

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Soil naturally contains harmless amounts of lead, along with other metals.

VOA: special.2009.06.09

Copper can also be mixed with other metals to make valuable alloys such as bronze, pewter and brass.

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Experts say this may explain why some objects are very worn in places because gold is very soft unless it is alloyed with other metals.

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Lumping gold in with other metals is another no-no.

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