Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia.

因此，一些科学家推断，地球早期的大气与现在的不一样，主要由氢、甲烷和氨构成。

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Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia.

因此，一些科学家推断，地球早期的大气与现在的不一样，主要由氢、甲烷和氨构成。

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