narrate
verb [ T ] uk/nəˈreɪt/ /ˈnær.eɪt/ us/nəˈreɪt/ /ˈner.eɪt/
讲（故事）;叙述
to tell a story, often by reading aloud from a text, or to describe events as they happen
Documentaries are often narrated by well-known actors. 纪录片常常由著名演员作旁白。
One by one the witnesses narrated the sequence of events which led up to the disaster. 目击者一个接一个地叙述了导致惨祸发生的一系列事件。