the collection and study of historical information using sound recordings of interviews with people who remember past events 口述历史（用访谈录音方法）；口述历史学 Oral history is the oldest form of history there is. 口述历史是最古老的历史形式。 Oral history enables us to take account of those many aspects of history that are not recorded in documents. 历史的许多方面未记录在案，是口头流传的历史使我们注意到这些层面。