ordovician []以下由轻松背单词网站提供
单词级别附加级基本释义n.[地] 奥陶纪,奥陶系 adj.奥陶纪的参考例句Marine volcanics of Early Ordovician was found in Zhifang region. 摘要纸房地区具有早奥陶世海相火山岩存在. 来自互联网This was the result from the large - scale regression in the Late Ordovician. 这是晚奥陶世晚期大规模海退的结果. 来自互联网 推荐阅读 |