protohuman

例句：

1. 1. Theprotohumans are the earliest knownprimates to have developed bipedalism.
   原始人类是最早发展出两足行走的灵长类动物。
2. 2. Thediscovery of early hominids has ledto a better understanding of human evolution.
   早期人类的发现有助于更好地理解人类进化。
3. 3. Theprotohuman fossils found in Africaoffer insights into the origins of modernhumans.
   在非洲发现的原始人类化石为现代人类的起源提供了线索。