位于费城市中心区的独立国家公园被称为“美国最具历史意义的一平方英里”。
The Independence National Historic Park is located right at the heart of downtown Philadelphia.
城市核心是城市的历史性中心区，与旧城、城市中心区、中央商务区、中央金融区有着不同的概念和范围。
Urban core is the historical central area of a city. It is a different concept and range than that of old city, urban central area, CBD, and central financial district.
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