nondivergentBNC²³⁶²¹³⁺¹ 基本例句 🌏不要说 This paper mainly deals with an initial- oblique derivative problem for nonlinear nondivergent parabolic systems of second order equations with measurable coefficients in a multiply connected domain. 讨论可测系数的二阶非线性非散度型抛物型方程组在多连通区域上的初-斜微商边值问题。 dictall