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carbon

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CO is the formula for carbon monoxide.(CO是一氧化碳的分子式。)
The particles interfere with the formation of carbon-14 on earth.(这些粒子干扰了地球上碳-14的形成。)
Humans take in oxygen and breathe out carbon dioxide.(人吸入氧气，呼出二氧化碳。)
We all need to look for ways to reduce our carbon footprint.(我们都需要寻找减少我们碳足迹的办法。)
The amount of carbon dioxide released by human activities such as burning coal and oil is small in comparison.(相比之下人类燃烧煤、石油等活动所释放的二氧化碳的量是少的。)
Diamond is the crystalline form of the element carbon.(钻石是碳元素的晶体结构。)
They forget about one of the key causes of carbon dioxide.(他们忘记了二氧化碳产生的其中一个关键原因。)
Carbon dust and oil build up in large motors and cause them to short-circuit.(碳尘和燃油在大发动机里越积越多，造成了发动机短路。)
Richer countries must do more to cut back carbon emissions.(较富裕的国家必须作出更大的努力来减少碳排放量。)
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。)

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