What is the biggest regret in life?

The biggest regret in life is that there is no if in life. The biggest regret in life is that there is no if in life. Hello! The biggest regret in life is that there is no if. The biggest regret in life is that I missed it, that is, I missed it and didn't regret taking medicine. The biggest regret in life is that there is no if in life. The biggest regret in life is that I missed it, that is, I missed it and didn't regret taking medicine. The biggest regret in life is that there is no if. The biggest regret in life is that I missed it, that is, I missed it and didn't regret taking medicine. The biggest regret in life is that there is no if in life. The biggest regret in life is that I missed it, that is, I missed it and didn't regret taking medicine.