swerve: suggests a usually somewhat abrupt physical, mental, or moral turning: suddenly ~d to avoid hitting an animal.


veer: implies a major change in direction often under an outside influence: at that point the road ~s to the right.


deviate: implies a turning from a customary or prescribed course and often implies irregularity: the witness never ~d from her story.


depart: suggests a deviation from a traditional or conventional course or type: a book that ~s from the usual memoirs of a film star.（tradition传统: 指代代传承的风俗信仰applies to customs or beliefs passed on or handed down from generation to generation，如it’s a tradition to give gifts at Christmas圣诞节送礼物是传统习俗，如keep up revolutionary tradition保持革命传统，如Japan's unique cultural traditions日本独特的文化传统(=traditional culture传统文化)，按照传统是by tradition，如by tradition, nobody interrupts an MP’s maiden speech按照传统，任何人不能打断下议员的首次演说，也可以说依照传统）    conventional procedure/weapons常规流程/武器


digress: applies to a departing from the subject at hand: frequently ~ed during his lecture.


diverge: may equal depart but usually suggests a branching of a single path into two or more leading in different directions: after medical school their paths ~d.   


swerve突然转向: 表示物体突然转向，或思想转变，veer大幅转向: 指大幅改变方向，如因遭受外力，deviate偏离: 表示离开了通常固定路线，因此常指反常，depart离开: 这里表示偏离传统或常规，digress跑题: 指偏离当前主题，diverge分开分歧: 也表示离开，但通常表示分叉到多个方向


记忆方法:  1）首字母SVDDDD想成Very Sudden 4Direction突然向四方<==偏转

               2）偏转的意思是偏离直线路径mean to turn aside from a straight course.