She is acting as deputy to the chairman of the board.她在代行董事会主席的职务。The chairman of the board succeeded in surviving the challenge to his authority.主席顶住了对他权威的挑战。He was the chairman of the board of governors at the school.他是学校董事会主席。There may be an opportunity for you to see the chairman of the board tomorrow.明天你也许有机会见到董事长。