paleace

例句：

1. 1. The paleace fossils found in the cave are a testament to the ancient life that existed there.
   洞穴中发现的白垩兽化石证明了那里曾经存在过古老的生命。
2. 2.Paleaces were among the first animals to evolve from primitive fish.
   白垩兽是最早从原始鱼类进化而来的动物之一。
3. 3. Paleaces have been extinct for over 65 million years, making them one of the oldest known animal species.
   白垩兽已经灭绝了超过6500万年，这使得它们成为已知最古老的动物物种之一。