Longman Dictionary of Contemporary English对avatar的解释是a picture of a person or animal that represents you on a computer screen, for example in some chat rooms or when you are playing games over the Internet,也即avatar多指在聊天室或网络游戏中的头像。
社交网站上的头像翻译为:The head of social networking sites 双语例句:1.那么,这是不是意味着大家喜欢的绿色头像是不是可以从社交网站上退场了呢?So, does this mean that everyone's new favorite color, "Solidarity Green, " will beginto fade away from social web avatars sometime soon? 2.据英国《每日邮报》8日报道,有些人是喜欢对自己社交网站上的好友数量炫耀不已,但大多数人都不会极端到将所有好友头像纹在自己的胳膊上。Some people like to boast about the number of friends they have on Facebook. Butmost do not go to the extreme of having their profile pictures tattooed down theirarm.