Carbon dioxide is the second most important greenhouse gas (after water vapour), trapping heat in our atmosphere and increasing global temperatures via the greenhouse effect.
排在水蒸气之后，二氧化碳是第二大重要的温室气体，它阻止我们的大气散热，并通过温室效应增加全球温度。
2
A trivial one is to argue that because water vapour is such a powerful greenhouse gas, carbon dioxide is unimportant.
微不足道的包括，有人提出，因为水蒸气是一种效果显著的温室气体，所以二氧化碳就无足轻重了。
3
He saw that the constituent parts were being separated, with hydrogen gas falling into the star while water vapour remained farther out and the dust was farther out still.