di·va·gate /ˈdaɪvəˌget, ˈdɪ-/
(v.)流浪;入岐途;離題
divagate
v : lose clarity or turn aside especially from the main subject
of attention or course of argument in writing, thinking,
or speaking; "She always digresses when telling a story";
"her mind wanders"; "Don't digress when you give a
lecture" [syn: digress, stray, wander]