They can also produce beautiful auroras.
不过，美丽的极光也可能形成于此。
On Earth, auroras appear over an area about as large as the United States.
在地球上，能看到极光的地区在面积上大约和美国相当。
Few auroras show this level of detail.
很少有极光能达到如此清晰的程度。
The auroras were unexpected because the initiating Sun has been unusually quiet of late.
极光的出现难以预计，因为最近太阳异常平静。
The auroras were unexpected because the initiating Sun has been unusually quiet of late.
极光的出现难以预计，因为最近太阳异常平静。
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