应该公平才是
something that you say when you want someone to behave reasonably or treat you the same as other people
Come on, it's my turn. Fair's fair! 得了吧，轮到我了。公正一点！
I don't usually like modern music, but fair's fair, that was beautiful.
He liked women, but fair's fair, they liked him too.
If he can take time off, so can I. Fair's fair.
If you want a tattoo of your kid's name, then fair dos, but I always advise against a wife or girlfriend's name.
See also: fair adjective (RIGHT)