North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. In can also be described as a northern subcontinent of the Americas[5][6] in models that use fewer than seven continents. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea.
这段话从你的链接摘过来的,意思是:北美洲北至北冰洋,西至太平洋,东至大西洋,南至加勒比海。所以概念上就是加拿大,美国和墨西哥。希望你能够看懂。 |