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ordovician

/ˌɔːr.dəˈvɪʃ.ən/

翻译: 奥陶纪,古生代的第二个纪,约距今4.85亿至4.43亿年,以海洋生物多样化(如牙形石、介形虫、藻类和海草)为特征。

1 个条目

noun

/ˌɔːr.dəˈvɪʃ.ən/C2formalscientific
  • zh奥陶纪,古生代的第二个纪,约距今4.85亿至4.43亿年,以海洋生物多样化(如牙形石、介形虫、藻类和海草)为特征。

A proper noun referring to a geological period and system, the second period of the Paleozoic Era, spanning from approximately 485 to 443 million years ago, characterized by the diversification of marine life such as conodonts, ostracods, algae, and seaweeds.

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  1. C2formalscientific

    A geological period and system of the Paleozoic era, spanning from about 485.4 to 443.8 million years ago, characterized by the diversification of marine life such as conodonts, ostracods, and algae.

    zh地质时期

    • The Ordovician period saw a significant increase in the number of marine species.
    • Fossils from the Ordovician include abundant conodonts and ostracods.
    • Algae and seaweeds were common in the shallow seas of the Ordovician.
词形
  • ordovicians plural form
  • ordovicians' possessive plural form
  • ordovician's possessive singular form