Metal content in tobacco leaf primarily is driven by the metal content of the soil in which it is grown, rather than resulting from processing.27.

烟叶中的重金属含量是由其产生的土壤带入的，而不是在生产加工过程中人为添加。

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Observations of dying stars, their metal content, and how they affect the planets around them could provide clues about the fate of our own solar system.

濒死恒星的观察值，它们的金属含量，以及它们如何影响到围绕它们旋转的行星，都能为我们的太阳系的命运提供线索。

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Incineration of heavy metals or materials with high metal content (in particular lead, mercury and cadmium) can lead to the spread of toxic metals in the environment.

焚烧重金属或金属含量高的材料(尤其是铅、汞和镉)可能使有毒金属传播到环境中。

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For those he used lead white, a traditional oil pigment he reckoned would show up in an x-ray due to the heavy metal content.

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They all trade at a premium to their metal content.

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There are "real concerns" about the impact on the Danube, he says, as "it will increase the heavy metal content of the water and it might have adverse effects on fish".

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