铁面无私[tiě miàn wú sī]
词典disinterested：无私的；公正的；不感兴趣的；不关心的。
词典be just and stern：铁面无私。
词典a stern look with severe lines about his mouth, without compunction or mercy
词典grave as a judge：摆出一付严肃的神气，板起脸孔；铁面无私。
词典The Untouchables：[电影]不可触犯。
铁面无私[tiě miàn wú sī]
be just and stern (to sb.); a stern look with severe lines about his mouth, without compunction or mercy; disinterested; grave as a judge; impersonal; impartial and incorruptible; not be moved by entreaty, prayer or tears from friends or relatives; not to