prehistorian

例句：

1. 1.He is a prehistorian who specializes in studying the fossils of dinosaurs.
   他是一位专门研究恐龙化石的古生物学家。
2. 2. The museum has a collection of prehistorian specimens from around the world.
   这个博物馆收藏了来自世界各地的史前生物标本。
3. 3.Prehistorians have been able to reconstruct some of the earliest human ancestors.
   古生物学家已经能够重建一些最早的人类祖先。