The beak shapes of different species of Galapagos finches played an important part in Darwin's conception of natural selection.

加拉帕戈群岛不同雀类的鸟喙形状达尔文的然选学说中扮演了重要角色。

Charles Darwin is famous for describing evolution by natural selection.

尔斯·达尔文因通过然选描述进化而闻名。

Perhaps eventually we could see life re-emerging slowly as traits, such as reduced oxygen-concentration concentration requirements and increased cellular resistance to UV radiation evolve via natural selection and mutation in both plants and animals.

也许最终，我们可以看到生命慢慢地重新出现，通过然选和动植物的突变，降低了对氧气浓度的要求，增强了细胞对紫外线辐射的抵抗力。

The one we know best is Darwinian natural selection.

其中最广为人知的理论之一就是 达尔文的然选论。

They've undergone selection for a higher metabolic rate that increases heat production.

他们有更高的新陈代谢率，产生更多热量来挺过然选的考验。

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

农业取代狩猎和采集的事实越来越多，产生然选压力。

Prey animals routinely attacked by venomous predators are under powerful pressure from natural selection.

经常被有毒捕食者袭击的猎物都承受着来然选的巨大压力。

Selection for gaudy plumage therefore works in both directions.

因此绚丽羽然选上往两个方向发展。

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

野外，任何表现出这些特征的个体都可能会受到然选的冷落。

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后代的然选中被淘汰掉。

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

此过程中，他们把通过然选来实现进化的原理引入了机器人科学领域。

We've created the next chapter in natural selection.

我们创造了然选新的篇章。

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

这推动了然选，使猎物物种变得更快、更强、更敏捷。

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

这是一种性选的形式，受然选的影响。

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

如果然选要起作用的话，就得需要某种尚未发现的替代机制。

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

然选是生物种群适应、繁殖和变化的过程。

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了弱者和胆小鬼。

As it has often been pointed out, however, there is nothing in the concept of natural selection that suggests that competition is the most successful strategy for " survival of the fittest" .

然而，正如人们经常指出的那样，然选的概念中没有任何东西表明竞争是最成功的“适者生存”策略。

In 1976's The Selfish Gene, biologist Richard Dawkins wanted to express how culture could be shaped by a process not unlike natural selection--that ideas and thoughts could survive and replicate based on their fitness.

1976年出版的《私的基因》一书中，生物学家理德·道金斯想表达的是，文化是如何通过一种与然选并无二致的过程形成的——思想和观念可以根据其适宜性而生存和复制。

In the six to eight million years since we split from our last common ancestor, chance mutations and natural selection have changed each of our genomes in radical — and unique — ways.

我们从最后一位共同祖先分化之后的 600 ~ 800 万年间，突变和然选，以独特的方式彻底地改变了我们的基因组。