CO is the formula for carbon monoxide.

CO是一氧化碳的分子式。

《牛津词典》

When you smoke, the burning of the cigarette creates something called carbon monoxide (CO) -- the same stuff that's created when your car burns gasoline.

当你吸烟，烟草燃烧产生CO——和你的汽车燃烧汽油产生的物质是同样的。

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Objective To investigate the role of carbon monoxide (CO) in the pathogenesis of asthma.

目的探讨一氧化碳(CO)等在小儿哮喘发病机制中的作用及意义。

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Carbon monoxide (CO) is difficult to detect because it is colourless and has no taste or smell.

BBC: Husband welcomes carbon monoxide decision

These include the exhaust gases such as nitrogen oxides (NOx), non-methane volatile organic compounds (NMVOCs), and carbon monoxide (CO).

BBC: London's clue to stubborn ozone levels

Cornwall Fire and Rescue Service has seen more than a five-fold increase in carbon monoxide (CO) poisoning cases over the last 12 months, it said.

BBC: Fire service sees rise in carbon monoxide poisoning cases