古元古代 的释义 | Babel Free
ku²¹⁴⁻²¹ ɥɛn³⁵ ku²¹⁴⁻²¹ taɪ̯⁵¹释义
the Paleoproterozoic era (part of the Proterozoic eon, spanning from 2.5 to 1.6 billion years ago)
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