chromospheric activity

例句：

1. 1.The sun's chromospheric activity is a source of energy for the Earth.
   太阳的日冕活动是地球的能量来源。
2. 2. Chromospheric activity has been linked to solar flares.
   日冕活动与太阳耀斑有关。
3. 3.The study of chromospheric activity helps us understand the behavior of the Sun.
   研究日冕活动有助于我们了解太阳的行为。