是…的写照;是…的真实反映
to represent or show something honestly
  The movie is a mirror of daily life in wartime Britain. 这部电影真实地反映了战时英国的日常生活。 
 They see fashion as a mirror of society.
 He wants his art to be uplifting, not a mirror of the suffering he has endured.
 The series of children's books became a mirror of postwar culture.
 Horror stories have always been a mirror of human nature.
 See also: mirror noun (REPRESENT)