This high result was interpreted to reflect previous auroral activity.
这一高结果可以用以前的极光活动来解释。
But freak solar activity yesterday saw the stunning auroral display stretch much further than usual, as it was spotted by stunned stargazers across half of northern America.
但是昨天反常的太阳活动造福了北美人民：超级绚丽的北极光此次的延伸范围广得多，使得半个美国的天文爱好者大饱眼福，亲眼见证了北极光。
The auroral absorptions are related to the solar activity.
极光吸收与太阳的活动性密切相关。
The auroral absorptions are related to the solar activity.
极光吸收与太阳的活动性密切相关。
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