一: one阶: steps; stairs微分: differential环节: link二阶微分环节: secondary derivative element微分环节: derivative element; differentiator比例微分环节: proportioning element一阶微分方程: differential equation of first order; first order differential equation; first-order differential equation一阶微分灵敏度: first-order differential sensitivity阶微分: n-th differential微分环: differential ring积分环节: integral element; integrating element高阶微分: differential of high order; differential of higher order; differentials of higher order高阶微分法: higher order differentiation陀螺积分环节: integrating gyro unit二阶微分滴定: second order differential titration二阶微分方程: second order differential equation; second-order differential equation高阶微分方程: differential equation of higher order; higher order differential equation三阶微分方程: third-order differential equation四阶微分方程: fourth-order differential equation二次微分, 二阶微分: second differential二阶微分方程组: second-order differential system一阶时间微分: first time differential一阶积分微分方程: first order integral-differential equation一阶偏微分方程: first order partial differential equation; partial differential equation of first order