However, the usual FDM (finite difference method) schemes disregard the symplectic conservation for conservative systems.
但通常的差分格式并不考虑保辛的性质，即使对保守体系。
FDM (Finite Difference method) is one of the important numeric calculation methods used in Groundwater Gynamics.
有限差分法是一种重要的数值计算方法。
FDM (Finite Difference method) is one of the important numeric calculation methods used in Groundwater Gynamics.
有限差分法是一种重要的数值计算方法。
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