Natural selection is the cornerstone principle of evolution.

物竞天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.

我们创造了自新的篇章。

I believe in Darwin's theory of natural selection.

我相信达尔文的自理论。

The one we know best is Darwinian natural selection.

其中最广为人知的理论之一就是 达尔文的自论。

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

回了这个问题，有助于理解自。

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

内瑟博士认为焦虑是自的结果。

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

如果自要起作用的话，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——绝对不是随机的。

Well, anxiety may be a result of natural selection.

好吧，焦虑可能是自的结果。

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

这是一种性的形式，受自的影响。

Natural selection hits on a good design.

自的图案都是最好的。

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

请把这件事情想像成进化， 而非物竞天，只是它是透过设计来进化。

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

这就是自在起作用，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，任何表现出这些特征的个体都可能会受到自的冷落。

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

自和性接二连三地淘汰了弱者和胆小鬼。

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

他所有的工作都是为了测试他关于自的宏伟理论。

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

自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.

这样的基因变异通常会在后代的自中被淘汰掉。