Hadean:
The Hadean /ˈheɪdiən/ is the first geologic eon of Earth and lies before the Archean.
en.wikipedia.org
冥古宙:
冥古宙(Hadean)是太古宙之前的一個宙,開始於地球形成之初,結束於38億年前,但依據不同的文獻可能有不同的定義。
zh.wikipedia.org
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Hadean冥古宙