do-gooder

名词 do-gooder:

1. someone devoted to the promotion of human welfare and to social reforms
   同义词：humanitarian, improver

do-good.er

n.（名词）
A naive idealist who supports philanthropic or humanitarian causes or reforms.
社会改良空想家：幼稚的理想主义者，支持善心或博爱的事件的改革者