美联储布拉德在演讲结束后回答观众提问； 货币政策无法改变生产率前景； 如果需要应对下一次衰退的话 美联储有弹药可用
The fed's bullard answer questions from the audience at the end of the speech; Monetary policy cannot change productivity prospects; If need to deal with the next recession The fed has ammunition
