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。

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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。

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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Paul Broca注意到“右利手”和左大脑半球专门负责语言能力的关系。

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The researchers say their findings add to the evidence that the evolutionary forces that cause right- and left-handedness are independent of culture.

BBC: Cave handprint, Montpellier University

George Michel, a professor of psychology at the University of North Carolina at Greensboro who has studied handedness in infants, described handedness as a continuum shifted largely to the right.

WSJ: Baseball's Oddest Fraternity

They suggest that because left-handedness is relatively rare it provides certain advantages over those who are right-handed, such as in solo and group fighting.

BBC: Cave handprint, Montpellier University