acting       
 noun [ U ] uk/ˈæk.tɪŋ/ us/ˈæk.tɪŋ/
 表演,演戏
the job of performing in films or plays
  He wants to get into acting. 他想从事演艺工作。 
 acting      
adjective uk/ˈæk.tɪŋ/ us/ˈæk.tɪŋ/
acting chairman, manager, etc. 代理主席(经理等)
someone who does a job for a short time while the person who usually does that job is not there
  He'll be the acting director until they can appoint a permanent one. 在他们任命正式董事长之前,他将代理这一职位。 
 Members of the group elected her to serve as acting chair.
 He had previously been the acting assistant secretary for secondary education.