And you're doing that through unnatural selection.

你在进行非自。

We've created the next chapter in natural selection.

我们创造了自新篇章。

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后代。

Natural selection hits on a good design.

自图案都是最好。

This means that we are the result of natural selection.

这意味着我们是自结果。

Selection for gaudy plumage therefore works in both directions.

因此绚丽羽毛在自往两个方向发展。

That's because there are other aspects of evolution besides natural selection.

因为除了自，依有其他进化因素。

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

这是一种性形式，受自影响。

So that's a lot of variation on which natural selection can act.

因此，自可以发挥作用变异有很多。

Natural selection is the process through which populations of living organisms adapt, reproduce, and change.

自是生物种群适应、繁殖和变化过程。

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

我们要找认为自很难证明观点。

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

回答了这个问题，有助于理解自。

But, as is often the case, natural selection knocks humanity's best efforts into a cocked hat.

但通常自把人类最大努力打得一败涂地。

The one we know best is Darwinian natural selection.

其中最广为人知理论之一就是 达尔文自论。

The fact that farming replaced hunting and gathering more and more created natural-selection pressure.

农业取代狩猎和采集事实越来越多，产生自压力。

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

这样基因变异通常会在后代自中被淘汰掉。

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。

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

但第二种力量——自——绝对不是随机。

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

内瑟博士认为焦虑是自结果。

It causes natural selection, which causes the prey species to become faster, stronger, quicker.

这推动了自，使猎物物种变得更快、更强、更敏捷。