digress from

• (谈话或文章)离题，扯开，扯到枝节上去：

  I'll tell you a funny story,if I may digress from my subject for a monent.

  如果允许我离题一会儿，我就给你们讲个有趣的故事。

  May I digress from our discussions for a moment and remind you that the train leaves at ten o’clock.

  我可以暂时打断一下讨论吗，我要提醒你，火车10点开。