有一天，月亮姐姐与安娜来到了北极。
另一方面，地球卫星北极附近的巨大环形山埃特肯盆地(aitken basin)，在月亮历史上，可能非常大导致了剧烈的旋转，迈罗氏提到。
On the other hand, a huge crater near the South Pole of Earth's moon-the Aitken basin-may be large enough to have triggered a dramatic roll early in the moon's history, Melosh noted.
在2010年3月，研究人员在月亮的北极发现了冰，尽管还不确认有多少。
In March 2010, researchers discovered ice on the North Pole, though researchers were not sure how much.
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