| 释义 |
奥陶纪 Àotáojìgeol. Ordovician period奥陶纪ÀotáojìOrdovician (geological period 495-440m years ago)奥陶纪【地质】Ordovician period奥陶纪a.Ordovician奥陶纪的;奥陶系的n.Ordovician奥陶纪;奥陶系奥陶纪1. [Geology] the Ordovician period; Ordovician奥陶纪Ordavician period奥陶纪Ordovician period奥陶纪Ordovician双向☞--奥陶纪--奥陶系双向☞奥陶纪 -- 奥陶系双向☞奥陶系--奥陶纪奥陶纪[地质]the Ordovician Period |