地球大气层中的甲烷是由活体生物产生的，而木星或其他气态行星上的甲烷是由光与大气层中其他化学物质相互作用而产生的。
On Earth, atmospheric methane is generated by living organisms, but on Jupiter and other gas giants, methane is produced by light interacting with other chemicals in the atmosphere.
在地球上， 大气层中90 %的甲烷来自于生命的生物化学活动。
On earth, 90 percent of the methane in the atmosphere comes from the biochemical activity of life.
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