vi. 论述, 讲演, 写论文, 论说

[ verb ]
talk at length and formally about a topic
<verb.communication> discourse hold forth
The speaker dissertated about the social politics in 18th century England

Dissertate \Dis"ser*tate\, v. i. [L. dissertatus, p. p. of
dissertare to discuss, intents, fr. disserere. See
{Dissert}.]
To deal in dissertation; to write dissertations; to
discourse. [R.] --J. Foster.