active sunspot prominence

例句：

1. 1.The active sunspot was causing a significant increase in the solar radiation.
   活跃的太阳黑子引起了显著的太阳辐射增加。
2. 2.The sunspot prominence is a key indicator of solar activity.
   太阳黑子突出是太阳活动的关键指标。
3. 3.This region has been experiencing an unusually active sunspot prominence recently.
   最近这个地区经历了异常活跃的太阳黑子突出。