translation.en: And he has a theory that it is possible -- it is possible -- that the human auditory system actually evolved to hear music, because it is so much more complex than it needs to be for language alone.
translation.zh: 他有一个理论： 有这么一种可能， 人类的听觉系统其实是 为听到音乐而进化发展的， 因为如果只是为了听到语言的话， 听觉系统就没必要如此复杂。