以下为句子列表：
英文: But that raises a further question: if left-handedness is beneficial, then why is it so rare?
中文: 但是那样却又提出了一个更深一层的问题：要是左撇子真的有利，可为什么他们的数量那么少呢？
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英文: It all seems to parallel ideas about left-handedness in human cultures.
中文: 人类文明在对待左撇子的观念上似乎全是对等的。
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英文: The brain may become less lateralised and this in turn could result in left-handedness and the development of certain superior skills that have their origins in the left hemisphere such as logic, rationality and abstraction.
中文: 大脑变得较少的横向并且这种转变导致用左手的习惯，某些高等能力源于左脑例如逻辑，理性和提取。
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