证明了电能密度表达式是介电张量对称性的必然推论；
The expression of energy density is proved as the deduction of this symmetry.
由热力学第一定律及无损条件导出了介电张量的对称性；
The symmetry of the permittivity tensor is found to be based on the first law of thermodynamics and the non-wastage condition.
利用微扰理论导出了系统的介电张量，研究发现，MMP具有完全不同于静态磁化等离子体介电张量的形式。
Adopting method of perturbation theory dielectric tensor of the system is derived, MMP shows a completely different form of the dielectric tensor with the static magnetic plasma.
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