中文摘要：

太阳的活动，在有在太阳的空气的磁性的精力的一个爆炸版本，是空间的最惊人的表明之一血浆活动。非潜在的、免费磁性的精力被在血浆和磁场之间的相互作用在光球和 sub-photospheric 层积累。在光球和更低的太阳的空气，血浆仅仅部分被电离，有三种类(或三液体) 血浆。Cowling 电导率应该因此在解释太阳的观察被考虑。在另一方面，磁性的精力的爆炸版本被相信被磁性的连接在日冕引起，在血浆充分被电离的地方并且实质上无碰撞。为无碰撞的血浆，然而，我们似乎没有对它的传导性的精确量的描述或明确的表达。为了身体上理解在无碰撞的血浆的磁性的连接是在进一步做的一项重要任务，在太阳的活动研究进行。这篇文章讨论太阳的活动研究的血浆观点。讨论以太阳的观察开始，然后，我们面对并且需要更好理解的血浆问题的分析。

英文摘要：

Solar activity, in which there is an explosive release of magnetic energy in the solar atmosphere, is one of the most spectacular manifestations of space plasma activity. Non-potential, free magnetic energy is accumulated by the interaction between plasma and magnetic fields in the photosphere and sub-photospheric layer. In the photosphere and lower solar atmosphere, plasma is only partially ionized and there is three-species （or three-fluid） plasma. Cowling conductivity should therefore be considered in ex- plaining solar observations. On the other hand, the explosive release of magnetic energy is believed to be caused by magnetic reconnection in the corona, where plasma is fully ionized and essentially collisionless. However, for collisionless plasma, we seem to have no precise quantitative description or formulation of its conductivity. To physically understand magnetic reconnec- tion in collisionless plasma is an important task in making further progress in solar activity studies. This article discusses the plasma perspective of solar activity studies. The discussion begins with solar observations, and then, an analysis of the plasma problems that we face and need to better understand.