palaeolith

例句：

1. 1.The paleolithic cave paintings are still studied for their artistic value.
   这些旧石器时代的洞穴绘画仍然被研究，因为它们的艺术价值。
2. 2. The discovery of the first human fossils in the Paleolithic era has revolutionized our understanding of human evolution.
   在旧石器时代首次发现人类的化石，已经彻底改变了我们对人类进化的理解。
3. 3. Paleozoic era is characterized by the emergence of dinosaurs and the development of landplants.
   古生代的特点是恐龙的出现和陆地植物的发展。