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.
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。
In winter the center of the polar vortex locates about the north of pole, but in summer it shifts to the western hemisphere.
冬季的极涡中心基本位于极心附近偏北的位置，而夏季极涡中心则明显移向西半球。
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