On earth, 90 percent of the methane in the atmosphere comes from the biochemical activity of life.

在地球上，大气层中90 %的甲烷来自于生命的生物化学活动。

youdao

On earth, 90 percent of the methane in the atmosphere comes from the biochemical activity of life.

在地球上，大气层中90 %的甲烷来自于生命的生物化学活动。

youdao