本项工作将从理论上考察耀斑－电流片的物理性质和几何结构,深入研究它的尺寸（特别是它的厚度）、其中的精细结构及其随时间的演化规律。通过数值实验的方式模拟根据不同的观测参数获得的电流片厚度，对比这些结果，评价已有的、根据观测数据直接测量到的电流片厚度的结果，以此帮助我们确认或修正已有的观测结果和结论；同时深入了解耀斑－CME电流片内发生的物理过程和控制电流片厚度的物理机制。研究电流片内部的物质密度、温度、电导率，这些参数随时间的演化，以及太阳爆发过程中所涉及的快速能量转换机制。作为对将来工作的引领，我们将定性讨论上述研究获得的结果对电流片内带电粒子加速的重要意义。

We propose to study the physical property and geometrical structure of the CME-flare current sheet, look into the scale, especially the thickness, of the sheet, the find structures inside, as well as the evolutional behaviors. We propose to model via numerical experiments the results for the sheet thickness that could be deduced from the observational data directly. Comparison of these results brings us to an evaluate of liability of the existing observational results for the sheet thickness, and help us to confirm or modify or correct these results and the associated conclusions. We are also investigating the mechasims that govern the scale of the sheet, studying the other parameters of the CME-flare current sheet, including the plasma density, temperature, conductivity, their evolution, as well as the energy conversion dominated by these parameters. To help promote our work in the future, we shall further discuss qualitatively the importance of the results given by the above research to studying the charged particle accelerations in the CME-flare current sheet.