为什么地球上只有一种智能生物？

Why does only one kind of wise mammal exist on the earth?

如果说智能有很强的生存值, 那么为什么智能生物会如此之少?

If intelligence has high survival value, why are so few creatures intelligent?

他们告诉我们除了地球宇宙中绝没有智能生物，但他们的确证实了地球上的智能生物有多罕见。

They tell us absolutely nothing about intelligence elsewhere in the universe, but they do prove how rare it is on Earth.

另一方面，所有的野兽和一般的动物不可能进化成智能生物，因为这是必然的。

On the other hand, all beasts and general mammals could not evolve into wise mammals, it is necessary.