additional ordinary differential equation的用法和样例：
- Ordinary differential equation arnold v. I.
- New and improved ordinary differential equation (ODE) solvers enable faster, more reliable calculations.
新的和经改进的常微分方程 (ODE) 求解器使计算变得更快、更可靠。
- The boundary value(problems(BVP)) of the higher order ordinary differential equation were studied.
- The existence of positive solution to some two-point boundary value problems are considered for third-order nonlinear ordinary differential equation.