It's suffused with a thick smog that's a perpetual sulphur-yellow, and suffocated by motes of coal dust suspended in the breeze.

它弥漫着一层永远都是硫化黄色的浓雾，微风里浮着的煤尘微粒让人窒息。

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The common colours are: blue for nitrogen, red for oxygen, yellow for sulphur and cyan for carbon.

颜色代表是：蓝色是氮，红色是氧，黄色是硫，蓝绿色(青色)是碳。

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"Bright yellow formed solid elemental sulphur in bulk" is not such an easy specification to maintain.

“亮黄色成型固体散装元素硫”并不是一个容易满足的技术要求。

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In the days ahead, our train will pass a succession of monstrous eastbound freight services, groaning with raw materials: Albertan oil and yellow sulphur, British Columbian coal and lumber, but mostly grain from the prairies.

BBC: The wonders of Canada by rail