我来回答,应该是stand for..
区别有一点点..有的时候要看英文解释才能更好地区别他们.
stand for一般是指缩写代表的是甚麽.
represent一般是指某个个人或团体代表了甚麽,更为正式.英文解释: to be a member of a group of people and act or speak on their behalf at an event, a meeting,etc.
on behalf of一般指代表某些人.英文解释:as the representative of sb or instead of them
另外,stand for不能用于进行时,on behalf of 是介词短语,另外两个是动词啊..区别很大的嘛.. 1642希望对你有帮助!