Firstly, the analysis methods of various forms of sulfur in coal were studied.

首先，研究了煤中各种形态硫含量的分析测定方法。

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The distribution and present forms of sulfur in the distillates from high-sulfur crude oils were overviewed.

综述了几种含硫原油的馏分油中硫的分布形态，以及硫化物的定性分析结果。

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The distribution and present forms of sulfur in the distillates from high-sulfur crude oils were overviewed. The results of qualitative analysis of the sulfur compound were discussed.

综述了几种含硫原油的馏分油中硫的分布形态，以及硫化物的定性分析结果。

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Interestingly enough, when examining the chemical composition of the Martian minerals, the Curiosity team discovered both oxidized and reduced forms of sulfur compounds.

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Sulfur dioxide forms lung-damaging soot and smog, and has been linked to an array of respiratory problems.

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