If a style of writing is discursive, it includes a lot of facts or opinions that are not necessarily relevant.
例句
...a livelier, more candid and more discursive treatment of the subject.对该主题的更生动、更坦率、更发散性的论述
英汉词典释义
adj.
东拉西扯的,离题的
a discursive essay东拉西扯的文章
英英词典释义
Adjective
1. proceeding to a conclusion by reason or argument rather than intuition
2. (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects;
"amusingly digressive with satirical thrusts at women's fashions among other things""a rambling discursive book""his excursive remarks""a rambling speech about this and that"