原始人

Primitive man made himself primitive tools from stones and bones.

原始人用石块和骨头做原始的工具。

Primitive man quickly learned how to manipulate tools.

原始人很快就学会了使用工具。

The Eskimos of the far north are primitive.

遥远北方的爱斯基摩人是原始人。

Primitive humans needed to be able to react like this to escape from dangerous animals.

原始人必须要能作出这样的反应以逃避危险的动物。

We think about the evolution of bipedalism as one of first events that led hominids down the path to being human.

双腿直立行走的进化是原始人向人类进化的最初阶段中的一步。