揭示；说明；解释；显示；

1. add details, as to an account or idea
    clarify the meaning of and discourse in a learned way, usually in writing

    e.g. She elaborated on the main ideas in her dissertation

    Synonym: elaboratelucubrateexpatiateenlargeflesh outexpandexpounddilate

2. state

    e.g. set forth one''s reasons

    Synonym: set forthexpound