A second source of carbon monoxide is Alberta, Canada, where large wildfires are burning.

另一个一氧化碳污染源在加拿大阿尔伯塔省，那儿正燃烧着熊熊大火。

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This review emphasized the endogenous source, the underlying mechanism and the effect to hypertension of carbon monoxide.

本文就一氧化碳的来源、作用机制及其对高血压的作用作一综述。

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Motor vehicles are the primary source of several important air pollutants: carbon monoxide, volatile organic compounds, and nitrogen oxides.

机动车辆是几种重要的空气污染物的主要来源：一氧化碳、挥发性有机化合物，和氮氧化物。

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Mr McPoland said it was too soon to determine the source of the carbon monoxide.

BBC: Neil McFerran (l) and Aaron Davidson (r)