在北美洲，最有潜力的城市是美国北卡罗来纳州的罗利-达勒姆、德克萨斯州的奥斯汀、盐湖城以及加拿大的卡尔加里。
In North America the best urban prospects - Raleigh-Durham, N.C.; Austin, Texas; Salt Lake City; and Calgary, Canada.
在地球上，北极的极地涡流主要集中在北美洲东部的加拿大，将寒冷的北极空气卷入美国北部平原。
On Earth, the arctic Polar Vortex is typically located over eastern north America in Canada and plunges cold arctic air to the northern Plains in the United States.
位于北美洲的加拿大是世界第二大国。
Canada, which is in North America, is the second largest country in the world.
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