采用时间和空间均为二阶精确的有限差分方法，将偏微分方程进行差分化。这样，空间的电磁场可由时间域有限差分法（FDTD）来求解。
The TM set of equations can be solved using a finite difference time domain (FDTD) approximation that is second-order accurate in both space and time.
有限差分法和有限单元法在时间域里更为方便。
The time domain finite difference and the finite element method are more convenient.
有限差分法和有限单元法在时间域里更为方便。
The time domain finite difference and the finite element method are more convenient.
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