oral history
noun/ˌɔːrəl ˈhɪstri/
/ˌɔːrəl ˈhɪstri/
[uncountable]- 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。
- Oral history is the oldest form of history there is.