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Methane is one of the principal gases contributing to the greenhouse effect.甲烷是造成温室效应的主要气体之一。Alkanes, such as butane and methane, are very flammable.丁烷，甲烷等烷烃均为易燃物品。Methane is the main constituent of natural gas.甲烷是天然气的主要成分。When they die, plants give off gases such as carbon dioxide and methane.植物死亡的时候会散发出二氧化碳和甲烷等气体。The blasts were caused by methane gas that ignited.爆炸是甲烷着火引起的。Microbes decompose organic waste into a mixture of methane and carbon dioxide.微生物把有机废物分解为一种甲烷和二氧化碳的混合物。In each methane molecule there are four CH bonds.每一个甲烷分子中有四个碳氢键。As household refuse decomposes, it produces an explosive gas, methane.家庭垃圾腐烂后会释出一种爆炸性气体—甲烷。Methane is often regarded as the second most important greenhouse gas after carbon dioxide.甲烷常被认为是仅次于二氧化碳的重要温室气体。The blasts were caused by pockets of methane gas that ignited.爆炸是由甲烷气囊被引燃造成的。 |