FDM method的用法和样例：
例句
- The nonlinear differential equations are solved using finite difference method.
用有限差分法求解非线性微分方程组。 - The FDM is applied to the numeric discreteness of control equations under the new coordinates and the corresponding programs are developed.
采用有限差分法对新坐标系中的模型控制方程进行了数值离散，根据差分格式编制了相应的计算程序。
