Ordovician
音標(biāo)發(fā)音
- 英式音標(biāo) [???.d??v??.?n]
- 美式音標(biāo) [???r.d??v??.?n]
- 英式發(fā)音
- 美式發(fā)音
基本解釋
- n.奧陶紀(jì)；奧陶系
- adj.奧陶紀(jì)的
英漢例句
- 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;
用作名詞 (n.)
英英字典
- from or referring to the period of time between about 485 and 445 million years ago, in which there were many different types of animals in the sea, including vertebrates (= animals with back bones), but no life on land