retrogression /ˌrɛtrəʊˈɡrɛʃən/

• 1. 

  N-UNCOUNT Retrogression means moving back to an earlier and less efficient stage of development. 倒退; 退化 [正式] [also 'a' N]

  例：

  There has been a retrogression in the field of human rights since 1975.

  自1975年来，人权状况出现了倒退。