the Paleozoic

• 古生代

the Paleozoic的用法和样例：

例句

1. My professor studies flora of the Palaeozoic Era.
   我的教授研究古生代的植物群。
2. On this basis the paleogeographical changing process during the Paleozoic in the eastern Qinling is discussed.
   在此基础上探讨了东秦岭古生代古地理变迁过程。