dr aaron sell, of the university of california, santa barbara, believes the ability to assess strength from voices evolved to help our ancestors avoid picking fights they were likely to lose.
美国加州圣巴巴拉大学的阿隆赛尔博士相信我们的祖先演化出这种依靠声音判断力量强弱的本能,以此来避免卷入对自己很可能不利的争斗。