据专家说，显然 Pedals 有一条腿或一只熊掌受伤，这使它不能舒服地用四肢行走。

Pedals apparently has an injured leg or paw that doesn't allow it to walk comfortably on all fours according to experts.

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一些动物用四肢行走，如老虎、狮子、大熊猫和狗熊。

Some animals can walk by four legs, such as tigers, lions, pandas and bears.

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因此我们可以断言：人类曾经进化过，但是从来没有像其他野兽那样在地上用四肢爬行过。

So we can affirm that human beings have ever evolved, but they had never crept with four limbs on the ground like those beasts.

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