depart from something
phrasal verb with depart verb [ I ] formal uk/dɪˈpɑːt/ us/dɪˈpɑːrt/
脱离，背离，偏离
to be different from the usual or expected way of doing or thinking about something
I see no reason for us to depart from our usual practice. 我看不出有打破惯例的必要。
At this point in the speech, the minister departed from his prepared text. 讲到此处，部长脱离了事先准备好的讲稿。