Some statistical relationships between coronal holes and prominence in solar active cycle 21 are analysed.

分析了太阳活动21周冕洞和日珥之间的一些统计关系。

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The cycle is repeated: the brain rests, then it becomes active, then dreaming occurs.

该循环重复：大脑休息，然后它变得活跃，然后做梦发生。

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Others predicted that it would be the most active solar cycle on record.

其他学者则预测这将会是有记录以来太阳周期中活动最频繁的一次。

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Stellar references, an impeccable record of customer service and an active development cycle with new features constantly in the pipeline are a must.

FORBES: 'Tis the Season to Budget for CSR Success

But "we believe that the Atlantic basin is still in an active hurricane cycle, " William Gray, who co-heads the CSU team, said in December.

CNN: NOAA predicts above-normal '08 hurricane season

The sun is currently in an active phase of its 11-year solar cycle, and it should continue to fire off big storms for a while yet.

MSN: Amazing video captures magical-looking sun storm