单词:Ordovician
音标:[.ɒ:dәu'viʃәn] ;
n. 奥陶纪, 奥陶系
a. 奥陶纪的
a. 奥陶纪的
n. from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
词型变化:名词复数形式 : ordovicians
词性分布:
Ordovician的用法和样例:
例句
用作名词(n.)
- This was the result from the large-scale regression in the Late Ordovician.这是奥陶纪晚期大规模海退的结果。
- Major hydrocarbon source rocks are in the Cambrian and Ordovician.寒武-奥陶系烃源岩是该区主力烃源岩;
词汇搭配
- Lower Ordovician早奥陶世
- Ordovician period奥陶纪
- Upper Ordovician晚奥陶世
- the Ordovician奥陶纪
【近义词】