But this evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant.
但是这种结合了不对称、解剖学和偶然性的进化机制并不能提供一个充分的解释来说明为什么右利手应该成为优势。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right-handedness or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制既可以支持右撇子，也可以支持左撇子。
In the 1860s the French surgeon Paul Broca noted a relationship between right-handedness and left-hemispheric brain specialization for language abilities.
在19世纪60年代，法国外科医生PaulBroca注意到“右利手”和左大脑半球专门负责语言能力的关系。
Why do humans, virtually alone among all animal species, display a distinct left or right-handedness?
为什么人类，事实上在所有的动物物种中独一无二地，显示出惯用左手或是右手？
Olivia: I read an interesting theory about that. It talked about the evolutionary origins of preferential3 right-handedness in humans.
奥莉维亚：我读过一篇有趣的相关论文，谈到人类选择使用右手的进化起源。
If asked to explain the significance of this preference most people reply that it is obviously the result of the predominance of right-handedness in the population.
如果被提请解释这一偏爱的意义时，大多数人会回答说，显然这是人们以右手为主的这种优势造成的结果。
If asked to explain the significance of this preference most people reply that it is obviously the result of the predominance of right-handedness in the population.
如果被提请解释这一偏爱的意义时，大多数人会回答说，显然这是人们以右手为主的这种优势造成的结果。
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