A large national debt also limits the government’s ability to respond to emergencies, including both military threats and economic downturns. And it makes the US vulnerable to changes in financial-market sentiment, as the European experience has shown.
庞大的国民债务还限制了政府响应紧急情况的能力，包括军事威胁和经济衰退。这还让美国易受金融市场情绪变化的影响，如欧洲经验所显示的那样。