If not natural selection, then what?
如果不是自然选择，那么又是什么呢？
That is how natural selection works.
这就是自然选择工作的方式。
That's what natural selection is all about.
这个就是自然选择。
Here's how natural selection is supposed to work.
先来看看自然选择是如何运作的。
Genetic drift can even counteract natural selection.
基因漂变甚至可以抵消自然选择。
The process is natural selection.
这个过程是自然选择。
这是自然选择。
Is it part of the natural selection process?
适者生存是物竞天择过程中的一部分吗？
Adaptation is the result of natural selection.
适应是自然选择的结果。
Can natural selection explain human personality?
物竞天择是否能解释人的性格？
So it really does matter whether natural selection is true.
因此自然选择究竟是否正确，真的非常重要。
Has there been natural selection for a 'language gene'?
有没有“语言基因”的自然天择？
Might evolution by natural selection explain complex thought?
通过自然选择的进化可以解释复杂的思维吗？
Markets and natural selection could help ease the problem, too.
市场及自然选择也可以帮助缓解这个问题。
The idea of evolution by natural selection is not hard to grasp.
自然选择导致进化的观点并不难理解，只需要把几个得到普遍认同的观点联系起来就能够得到。
And the challenge was the theory of evolution by natural selection.
其中极富挑战性的观点则是生物进化是通过自然选择实现的。
Darwin's theory of natural selection is intended to answer this question.
达尔文的自然选择理论正是为了回答这个问题。
More important, another chance for natural selection has been removed.
更重要的是，又一次自然选择的机会消失了。
This process is known as natural selection or 'survival of the fittest'.
这个过程称为自然选择或“最适者生存”。
The discipline seeks to explain behavior as a product of natural selection.
该学科试图将行为作为自然选择的一个产物来解释。
Does natural selection only work on physical or it also work on mental as well?
物竞天择理论究竟是只在自然物质方面起作用呢还是也在精神方面起作用？
They say that some 7percent of human genes bear the signature of natural selection.
他们说7%的人类基因都有自然选择的标记。
More important, it sits better with biology's most fundamental principle, that of natural selection.
更重要的是，它符合了生物学自然选择的最基本规则。
The question becomes how can natural selection create, or simply allow for, such inappropriate behavior?
自然选择怎么会创造(或者允许)这种不当行为的？
Natural selection is what we normally think of as Darwin’s big idea.
我们通常认为自然选择（理论）是达尔文的伟大思想发现。
Natural selection can also, sometimes, be an agent of genetic uniformity.
有时，自然选择也是物种特性统一的推动者。
Natural selection is a process that may lead to the origin of new species.
物竞天择是一个可以致使新物种产生的过程。
Natural selection is a process that may lead to the origin of new species.
物竞天择是一个可以致使新物种产生的过程。
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