a person, usually a woman or girl in an organized group, who leads the crowd in shouting encouragement and supporting a team at a sports event

She was a cheerleader for the Dallas Cowboys. 她是达拉斯牛仔队的拉拉队队员。

someone who strongly supports a particular idea or person

He was a cheerleader for the new economic plan. 他曾支持新的经济计划。