At first, the extra oxygen they produced didn't accumulate in the atmosphere, but combined with iron to form ferric oxides, which sank to the bottom of primitive seas.
起初,它们所产生的额外的氧没有积聚在大气里,而是与铁化合,成为氧化铁,沉入了原始的海底。
单词 | ferric |
释义 |
ferric
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