disquisition
noun /ˌdɪskwɪˈzɪʃn/
/ˌdɪskwɪˈzɪʃn/
(formal)- a long complicated speech or written report on a particular subject
专题演讲；专题论文；专题报告 词源late 15th cent.: via French from Latin disquisitio(n-) ‘investigation’, based on quaerere ‘seek’. The original sense was ‘topic for investigation’, which became ‘discourse in which a subject is investigated’ (mid 17th cent.).