一类: of the same class; of the sa ...四: four阶: steps; stairs偏: inclined to one side; slanti ...系统: system的: 4次方是 The fourth power of 2 i ...控制问题: control problem一阶偏微分方程: first order partial differential equation; partial differential equation of first order非线性二阶偏微分方程: nonlinear 2order partial differential equa偏微分方程: partial differential equation; partialdifferentialequation四阶微分方程: fourth-order differential equation偏微分方程式的初值问题: initial value problem of partial differential equation偏微分方程式: partial differential equation偏微分方程组: system of partial differential equations偏微分方程边值问题差分方法: finite difference method for boundary value problem of partial differential equation偏微分方程初值问题差分方法: finite difference method of initial value problem of partial differential equation; finite difference metial differential equation非线性偏微分方程: nonlinear partial differential equation混合型偏微分方程: partial differential equation of mixed type近代偏微分方程: modern partial differential equations联立偏微分方程: simultaneous partial differential equations拟线性偏微分方程: quasilinear partial differential equation抛物型偏微分方程: parabolic partial differential equation; partial differential equation of parabolic type; partial differential equationf parabolic type偏微分方程理论: theory of partial differential equations偏微分方程数值解: numerical solution of partial differential equation偏微分方程语言: partial differential equation language
