早奧陶世 的释义 | Babel Free
t͡sɑʊ̯²¹⁴⁻²¹ ˀɑʊ̯⁵¹ tʰɑʊ̯³⁵ ʂʐ̩⁵¹释义
the Early Ordovician epoch (part of the Ordovician period, spanning from 485.4 to 470 million years ago)
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