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最北端：Vancouver 
(49° 15′ N, 123° 6′ W)
(49° 15′ N, 123° 6′ W)最西端：Neah Bay (48° 21′ N, 124° 36′ W)
(48° 21′ N, 124° 36′ W)最东端：Washington D.C. (38° 53′ N, 77° 2′ W)
(38° 53′ N, 77° 2′ W)最南端：Miami (25° 46′ N, 80° 13′ W)
(25° 46′ N, 80° 13′ W)加入时间：9个月前