他们的行走风格比我们的更原始，但它为我们了解祖先如何学会走路提供了线索。

Their walking style is a lot more primitive than ours, but it could hold clues to how our own ancestors learned to walk.

youdao

你看，我们远古的先祖几乎花费了一百万年，才学会用下肢直立行走。

You see, it took our ancestors almost a million years to learn how to walk on their 5)hind legs.

youdao

你看，我们远古的先祖几乎花费了一百万年，才学会用下肢直立行走。

You see, it took our ancestors almost a million years to learn how to walk on their 5 hind legs.

youdao