Paleozoic

Eogyrinus (an amphibian) of the Carboniferous

The Paleozoic (or Palaeozoic) Era (pronunciation: /ˌpeɪliəˈzoʊɪk, ˌpæ-/; from the Greek palaios (παλαιός), "old" and zoe (ζωή), "life", meaning "ancient life") is the earliest of three geologic eras of the Phanerozoic Eon, spanning from 541 to 252.17 million years ago. It is the longest of the Phanerozoic eras, and is subdivided into six geologic periods (from oldest to youngest): the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon, and is followed by the Mesozoic Era.

单词	Primitive period
释义	Primitive period 英语百科 Paleozoic The Paleozoic (or Palaeozoic) Era (pronunciation: /ˌpeɪliəˈzoʊɪk, ˌpæ-/; from the Greek palaios (παλαιός), "old" and zoe (ζωή), "life", meaning "ancient life") is the earliest of three geologic eras of the Phanerozoic Eon, spanning from 541 to 252.17 million years ago. It is the longest of the Phanerozoic eras, and is subdivided into six geologic periods (from oldest to youngest): the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon, and is followed by the Mesozoic Era.
随便看	A Check A checks ached for a cheeseburger ache for ache for sth achefully ACHE gene Achegour acheh hd. acheikh acheikhs acheilary acheilia Acheilognathinae acheilognathus himantegus acheilous acheilus Acheiria Acheiropodia Acheiropody Acheiropoieta acheiropoietic Acheiropoieton acheirous

Primitive period

Paleozoic