奥陶纪

See also: 奧陶紀

Chinese

For pronunciation and definitions of 奥陶纪 – see 奧陶紀 (“the Ordovician period”). (This term, 奥陶纪, is the simplified form of 奧陶紀.)
Notes: Simplified Chinese is mainly used in Mainland China and Singapore. Traditional Chinese is mainly used in Hong Kong, Macau, and Taiwan.

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