But other factors – such as complex societies, ceremonies, spiritual beliefs, art, music, technology, and language – also characterize modern human populations. Which traits are crucial to the definition of a “modern human,” and how far back can the classification be applied?
但其他要素——比如复杂的社会、礼仪、精神信仰、艺术、音乐、技术和语言——也是现代人类种群的特征。什么特征是定义“现代人”的关键要素，这一分类可以追溯到多远？