美国

the United States of America; USA; US; United States; America

主要

main; major; chief; essential; principal; primary; leading; key; central; foremost; cardinal; paramount; predominant; arch-; above all

城市

city; town; metropolis; urban area; burg; conurbation; urban; civic; municipal; urbanized; metropolitan

象征

symbolize; represent; signify; denote; typify; indicate; personify; incarnate; symbol; mark; measure; symbolism; representation; indication; emblem; token; personification; badge; insignia; metaphor; symbolic; emblematic; indicative; metaphorical