Ordovician

常見(jiàn)例句

用作名詞 (n.)

• This was the result from the large-scale regression in the Late Ordovician.
  這是奧陶紀(jì)晚期大槼模海退的結(jié)果。
• Major hydrocarbon source rocks are in the Cambrian and Ordovician.
  寒武-奧陶系烴源巖是該區(qū)主力烴源巖;
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