古生代的

例句：

1. 1. The Paleozoic era is characterized by the appearance of dinosaurs and other ancient creatures.
   古生代时代以恐龙和其他古代生物的出现为标志。
2. 2. Paleozoic rocks are often used in geology to study the Earth's past.
   古生代岩石常用于地质学中研究地球过去的情况。
3. 3. Paleozoic fossils provide valuable insights into the early life on Earth.
   古生代化石为了解地球早期生命提供了宝贵的信息。