somebody who is enthusiastic about change in an organization, a company, etc. and tries to get others to support it 改革斗士（指热衷於机构、公司等改革的人）◆He has a reputation in the group as a champion of change. 他在集团里以改革斗士着称。
a person who is chosen to lead a change programme (= a project to change the way a company, an organization, etc. operates) 改革领导者（公司、机构等的改革方案的领导者）◆She was appointed as a champion of change in management's drive to modernize the company. 她获任命为公司的改革领导者，带领公司进行现代化管理的改革。SYNchange agent