奧陶紀

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See also: 奥陶纪

Chinese[edit]

the Ordovician period
trad. (奧陶紀) 奧陶
simp. (奥陶纪) 奥陶
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Pronunciation[edit]


Proper noun[edit]

奧陶紀

  1. (geology) the Ordovician period (part of the Paleozoic era, spanning from 485.4 to 443.4 million years ago)

See also[edit]