最終更新日：2024/07/28
The Proterozoic is a name given to the eon from 2.5 billion to 541 million years ago.
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The Proterozoic is a name given to the eon from 2.5 billion to 541 million years ago.
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The Proterozoic is a name given to the eon from 2.5 billion to 541 million years ago.
The Proterozoic is a name given to the eon from 2.5 billion to 541 million years ago.
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