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。
Darwin was a "born natural historian", who was well known for his theory of natural selection.
达尔文是一个“天生的博物学者”，以自然选择学说闻名于世。
On the theory of natural selection we can clearly understand the full meaning of that old Canon in natural.
根据自然选择学说，我们便可充分理解那自然史上的古老格言的意义。
A major implication of Darwin and Wallace's theory of natural selection is that all life forms, living and extinct, are descended from a single common ancestor.
达尔文和华莱士的物竞天择理论都蕴含一个主要的观点：即所有现存和已灭绝的生命形式都起源于同一个共同的祖先。
And it might occur to some of you that this seems to be an analogy with the Darwinian theory of natural selection where there's a random assortment of random mutations.
也许你们之中会有人觉得，这和达尔文的自然选择理论，看上去很相似，自然选择就是随机突变的随机分配。
Charles Darwin, by contrast, found a lead for his theory of natural selection in the whimsical hobby of pigeon fancying, where the birds showed an enormous variety of form and behaviour.
达尔文则相反，他最初就是在放鸽子运动中通过一些特殊的习性发现了自然选择理论(鸽子奇特习性)，它们在行为方式上表现出巨大的变化。
The idea that our mental terrain decides what information survives in our heads and what gets killed off finds a parallel with a venerable biological theory: Darwin's theory of natural selection.
我们的心理地形决定了什么信息能留在我们大脑里同时什么需要剔除，这个学说和一个已经被广为接受的生物理论很近似：达尔文的自然选择理论。
An early visitor was Charles Darwin nearly 175 years ago, on a trip that inspired his theory of evolution by natural selection.
大约在175年前，一位早期的访客在旅途中得到灵感-自然选择学说产生了，他就是查尔斯·达尔文。
That is a great deal less than the general theory of the mechanics of evolution that the Darwinists suppose that natural selection provides.
这个观点与进化机制理论——通常进化论者假设自然选择提供了这种机制——的重要性还不能相比。
The book was “On the Origin of Species”. And the challenge was the theory of evolution by natural selection.
这个人就是查理斯•罗伯特•达尔文，这本书叫做《物种起源》，而发起的挑战则是基于自然选择说的进化论。
For example, not long after the events of 1848, Charles Darwin presented his theory about natural selection in Britain.
比如，1848事件后不久，查尔斯·达尔文在英国发表自然选择学说。
Left us with a theory of adaptation through natural selection that remains at the core of modern evolutionary biology.
达尔文给我们留下了通过自然选择适应的理论，这仍然是现代进化生物学的核心。
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。
Reciprocal altruistic behavior exists not only among organisms but also in the society, but it has been hard to explain the altruistic behavior of organisms to the classical natural selection theory.
互惠利他行为是生物有机体乃至人类社会普遍存在的一种现象，经典的自然选择学说难以解释生物有机体的这类行为。
One could try to escape the dilemma and say that life and man are not solely a product of natural selection, but to do this undermines the central concept and motive force of evolutionary theory.
一个办法可以试着逃脱这个两难的困境，认为生命和人不是孤独的，是自然选择的成果，但是这样做会渐渐破坏进化理论的中心观念和理论动机的影响力。
English natural scientist whose 'On the Origin of Species' formulated a theory of evolution by natural selection (1809-1882).
英国博物学家（1809-1882），他的《生物起源论》阐明了自然选择的进化论学说。
The theory that groups of organisms change with passage of time, mainly as a result of natural selection, so that descendants differ morphologically and physiologically from their ancestors.
主要由于自然选择的结果，生物体群经历了阶段性的变化，使后代在形态和生理上都与它们的祖先有所不同的理论。
Darwin was convinced that the theory of evolution is based on natural selection.
达尔文坚信进化论的基础是物竞天择。
Darwin was convinced that the theory of evolution is based on natural selection.
达尔文坚信进化论的基础是物竞天择。
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