digress

离题；走向岔道英释中释vIf you digress, you move away from the subject you are talking or writing about and talk or write about something different for a while

1 I've digressed a little to explain the situation so far, so let me now recap..我刚才稍微离题说明了迄今的情况，现在让我重述一下要点。

2 She digressed from her prepared speech to pay tribute to the president..她偏离了预先准备的讲稿，对总统表示了敬意。