documentary
/ˌdɑkjəˈmɛnəri/
relating to or consisting of or derived from documents
中文释义：文件的；文献的；记录的
The historian presented documentary evidence to support her theory.
历史学家提供了文献证据来支持她的理论。
Documentary films provide a factual account of real events.
纪录片提供对真实事件的事实性描述。