雅思阅读：美国城市压力排行

　　by leaps and bounds：very rapidly(飞跃地，非常迅速地)

　　high-powered：having great power or energy; dynamic(有权势的;精力旺盛的)

　　wheeler-dealer：one who advances one's own interests by canny, aggressive,or unscrupulous behavior(商界或政界的工于心计的人，进行复杂交易的人)