methane [ˈmi:θeɪn]

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n.甲烷，沼气

a colourless gas without a smell , which is often used as a fuel

The blast was caused by pockets of methane gas that ignited. 爆炸是由数袋甲烷气体着火引起的。
Methane may have extraterrestrial significance. 甲烷具有星际意义。