life sentence          
noun [ C ] uk/ˌlaɪf ˈsen.təns/ us/ˌlaɪf ˈsen.təns/
 (also informal life)长期监禁;(美国的)终身监禁,无期徒刑 
the punishment of being put in prison for a very long time, or, in the US, until death
 See also: life imprisonmentlifer 
  让(某人)一生都要遭受折磨的(事件)
something that will make a person suffer for the rest of their life
  His life sentence was to have to live without her. 不再和她一起生活,這是他一辈子的折磨。