(of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects
同义词：digressive, discursive, rambling
excursive详细解释
ex.cur.sive adj.（形容词）Of, given to, characterized by, or having the nature of digression.离题的：具有、加以、赋以离题本质的 【引伸】 excur.sively adv.（副词）excur.siveness n.（名词）
