層侵紀 的释义 | Babel Free
t͡sʰɤŋ³⁵ t͡ɕʰin⁵⁵ t͡ɕi⁵¹释义
the Rhyacian period (part of the Paleoproterozoic era, spanning from 2.3 to 2.05 billion years ago)
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