Pithecanthropus erectu

例句：

1. 1.Pithecanthropus erectu is the earliest known species of human.
   直立人是人类最早的已知物种。
2. 2. The discovery of Pithecanthropus erectu has shed light on our evolutionary history.
   直立人的发现为我们提供了关于我们进化历史的线索。
3. 3.Pithecanthropus erectu was found in Africa, dating back to around 2.7 million years ago.
   直立人被发现于非洲，距今约270万年前。