Previously, the earliest indications of oxygen had been from between 2.3 billion and 2.4 billion years ago when the "Great Oxidation Event" occurred.
之前认为，氧气最早出现的迹象是在2.3亿到2.4亿年前之前，那时侯正经历着“大氧化事件”
Previously, the earliest indications of oxygen had been from between 2.3 billion and 2.4 billion years ago when the "Great Oxidation Event" occurred.
之前认为，氧气最早出现的迹象是在2.3亿到2.4亿年前之前，那时侯正经历着“大氧化事件”
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