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CO is the formula for carbon monoxide.

CO是一氧化碳的分子式。

《牛津词典》

The limit for carbon monoxide is 4.5 per cent of the exhaust gas.

尾气中一氧化碳的排放量限制在4.5% 以下。

《柯林斯英汉双解大词典》

Medical experts say small amounts of carbon monoxide over a long period of time can greatly harm an unborn baby.

VOA: special.2010.02.02

It found that the average number of carbon monoxide deaths in the United States was greatest in the month of January.

VOA: special.2010.02.02

The most important weapon against carbon monoxide poisoning is the safe use of materials to heat any enclosed area.

VOA: special.2010.02.02

"The thing about carbon monoxide poisoning is that the carbon monoxide itself is odourless, colourless, tasteless so it's a silent killer, " he said.

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

"As there is no carbon in the fuel, hydrogen-powered vehicles produce no carbon monoxide, carbon dioxide or particulate emissions, " said Wrightbus business development director Jonathan Poynton.

BBC: RELATED BBC SITES

This gas contains approximately 80% of the original energy content of the coal, and is a combination of hydrogen, carbon monoxide, carbon dioxide, and methane.

FORBES: Underground Coal Gasification: A Trend Worth Watching