The author who made use of Green theorem and the solution of Poiseuille's equation proved that when two kinds of dielectric distribution in a space ( or more than one dielectrics) a simple proportional ralation mentioned above is the first kind of dielectric:(?) 本文通过运用格林定理与求解泊松方程的方法,证明了在空间分布两种介质(或多种介质)的情况下,在第一种介质中任一点的电场强度仍存在着简单比例关系:(?)