偶极，四极。方位角对称。静磁，带电量守恒及磁力。
Dipoles, Quadrupoles. Azimuthal Symmetry. Magnetostatics, Charge Conservation and Magnetic Force.
如利用的是整个大圆的积分，得到的是球面上任何点及其对蹠点上函数的平均值，或者说得到的是球面上函数的偶对称部分。
If the whole integrals on the great circle are used, the average of the function values for any point and its antipodal can be obtained.
本文讨论了非线性对称平板波导中的TE波的偶模及奇模的传输问题。
The transmission problems of an even mode and an odd mode of TE waves in symmetric slab waveguides are considered.
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