原始问题：
今日美国民众享物质繁荣，超多数过往时代
Today ordinary Americans enjoy a level of material prosperity unmatched by most of the world's population.
今日美国民众享物质繁荣，超多数过往时代
Today ordinary Americans enjoy a level of material prosperity unmatched by most of the world's population.
Prev：城市智慧停车系统规划设计摘要