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最北端：Anchorage (61° 12′ N, 149° 53′ W)
(61° 12′ N, 149° 53′ W)最西端：Anchorage (61° 12′ N, 149° 53′ W)
(61° 12′ N, 149° 53′ W)最东端：Washington D.C. (38° 53′ N, 77° 2′ W)
(38° 53′ N, 77° 2′ W)最南端：Tucson (32° 13′ N, 110° 58′ W)
(32° 13′ N, 110° 58′ W)加入时间：7个月前