to treat or represent sb/sth fairly, especially in a way that shows how good, attractive, etc. they are 公平对待某人（或某事）；给予公正的评价
That photo doesn’t do you justice.
那张照片把你给照走样了。
to deal with sb/sth correctly and completely 恰当处理某人（或某事）
You cannot do justice to such a complex situation in just a few pages.
你不可能仅仅几页就将这么复杂的形势恰如其分地描述出来。