system of differential equations 基本例句 微分方程组 This is called a normalsystem of differential equations.这称为正规微分方程组。 The dynamical equations of rigid flexible coupling multibody systems have characters of stiffness and high frequency oscillation.刚柔耦合多体机械系统动力学微分方程组具有刚性和高频振荡的特点。