There are few survivors of the animals that lived in the Paleozoic period. 古生代的动物现今已鲜有孑遗。
The Galeaspid is one major group of Agnatha in the Middle Paleozoic, and is mainly distributed in China and North Vietnam. 摘要盔甲鱼类是古生代中期化石无颌类的主要类群,其分布主要限于我国境内以及越南北部。
用作名词 (n.)
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。
Ancient plant in the early Paleozoic marine mainly to the late Silurian Period, the original plants begin boarding land. 古植物在古生代早期以海生藻类为主,至志留纪末期,原始植物开始登上陆地。