reinvent the wheel
重复造轮子；白费力气做事
建议不要重复劳动时
英文释义
to unnecessarily create or do something that has already been done or created before, often resulting in wasted time and effort
例句
Why reinvent the wheel when there are already proven solutions available?
典故来源
源自工业革命时期，指人们试图重新发明已经存在的轮子，比喻做无用功。