to waste time creating sth that already exists and works well 重复发明；无谓地重复；浪费时间做无用功
~ sth/yourself (as sth)to present yourself/sth in a new form or with a new image 以新形象示人；以新形式出现
The former wild man of rock has reinvented himself as a respectable family man.
过去的那位摇滚狂人已经改变形象，成了一位体面的爱家的男人。