顶轮活动到了极至。
在全国范围内开展的其它两轮活动暂定时间分别为5月18-22日和6月1-5日。
Two additional national rounds have been tentatively scheduled for 18-22 May and 1-5 June.
尽管最近的研究也提出来太阳可能还会归于平静，但是由于太阳又进入了新一轮活动期，所以它的活动又呈现加剧的趋势。
Recently, it showed signs of picking up as the Sun enters a new cycle of activity, although recent research raises the possibility of a new lull.
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