Natural selection is the cornerstone principle of evolution.

物竞天择说是进化论的基础原则。

Natural selection rewarded our ancestors for collaboration, and for forming connections with each other.

在物竞天择中，我们的祖先互相合作，并且建立彼此的关系而存活下来。

We've created the next chapter in natural selection.

我们创造自然择新的篇章。

I believe in Darwin's theory of natural selection.

我相信达尔文的自然择理论。

The one we know best is Darwinian natural selection.

其中最广为人知的理论之一就是 达尔文的自然择论。

To answer this question, it helps to understand natural selection.

问题，有助于理解自然择。

Dr Nesse suggests that anxiety is a result of natural selection.

内瑟博士认为焦虑是自然择的结果。

If natural selection were to work, some alternative, unconsidered mechanism was required.

如果自然择要起作用的话，就得需要某种尚未发现的替代机制。

But the second force, natural selection, is definitely not random.

但第二种力量——自然择——绝对不是随机的。

Well, anxiety may be a result of natural selection.

好吧，焦虑可能是自然择的结果。

This is a form of sexual selection and is subject to natural selection.

是一种性择的形式，受自然择的影响。

Natural selection hits on a good design.

自然择的图案都是最好的。

Think of it as evolution not by natural selection, but evolution by design.

请把件事情想像成进化， 而非物竞天择，只是它是透过设计来进化。

That's natural selection at work, one of the main drivers of evolution.

就是自然择在起作用，是进化的主要驱动力之一。

We're looking for the viewpoint that natural selection is difficult to prove.

我们要找认为自然择很难证明的观点。

In the wild, any individual manifesting them would probably get short shrift from natural selection.

在野外，任何表现出些特征的体都可能会受到自然择的冷落。

One by one, natural selection and sexual selection leave the weak and the timid behind.

自然择和性择接二连三地淘汰弱者和胆小鬼。

All of his work was designed to test his grand theory of natural selection.

他所有的工作都是为测试他关于自然择的宏伟理论。

Natural selection might be expected to favour the progeny of men who enjoy bringing them up.

自然择也许更偏爱那些乐于带孩子男人的后代。

Such a genetic tweak would ordinarily be winnowed out by natural selection over subsequent generations.

样的基因变异通常会在后代的自然择中被淘汰掉。