不过，是否人类一直都如此偏爱右手呢？一些科学家曾从古代石器工具的切削痕迹中发现人类对右手的偏爱。
But have humans always been so heavily right-handed? Some scientists had previously detected a right-hand bias when they looked at the flaking patterns on ancient stone tools.
不过，是否人类一直都如此偏爱右手呢？一些科学家曾从古代石器工具的切削痕迹中发现人类对右手的偏爱。
But have humans always been so heavily right-handed? Some scientists had previously detected a right-hand bias when they looked at the flaking patterns on ancient stone tools.
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