unreality       
noun [ U ] uk/ˌʌn.riˈæl.ə.ti/ us/ˌʌn.riˈæl.ə.t̬i/
 不真实
the quality of not being or seeming to be real
  There was a feeling of unreality about the trip, as if I'd stepped into another world for two weeks. 这次旅行有一种不真实的感觉,我仿佛进入了另一个世界两周。 
 There are tensions in the story, especially between reality and unreality. 故事中存在张力,尤其是在现实与虚构之间。 
 See: unreal
 - More examples
 - There was a terrible unreality about her - as if talking to someone under water.
 - the comic unreality of the play
 - There's an air of unreality about the situation.