Natural selection is the cornerstone principle of evolution.

物竞天说是进化论基础原则。

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

在物竞天中，我们祖先互相合作，并且建立彼此关系而存活下来。

We've created the next chapter in natural selection.

我们创然选新篇章。

I believe in Darwin's theory of natural selection.

我相信达尔文然选理论。

The one we know best is Darwinian natural selection.

其中最广为人知理论之一就是 达尔文然选论。

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

回答这个问题，有助于理解然选。

Well, anxiety may be a result of natural selection.

好吧，焦虑可能是然选结果。

Natural selection hits on a good design.

然选案都是最好。

A says natural selection explains how species change gradually over time.

A 说然选解释物种如何随着时间逐渐变化。

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

如果然选要起作用话，就得需要某种尚未发现替代机制。

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

但第二种力量——然选——绝对不是随机。

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

这是一种性选形式，受然选影响。

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.

这就是然选在起作用，是进化主要驱动力之一。

This means that we are the result of natural selection.

这意味着我们是然选结果。

Natural selection contributes to the basis of Darwin's theory of evolution.

然选为达尔文进化论打下基础。

In doing so, they have brought to robotics the principles of evolution by natural selection.

在此过程中，他们把通过然选来实现进化原理引入机器人科学领域。

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

然选和性选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.

他所有工作都是为测试他关于然选宏伟理论。

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然选中被淘汰掉。