He points out that the ice remained in Europe long after solar activity picked up from the Maunder minimum.

他指出，那次冰冻时期后太阳活动活跃起来了冰山依然在欧洲保留。

youdao

Between 1645 and 1715 almost no sunspots were observed, a solar period which came to be called the Maunder Minimum.

1645年到1715年间，几乎没有任何太阳黑子活动被观察到，这种时期即是所谓的。

youdao

This is known as the Maunder Minimum, named after English astronomer Walter Maunder.

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