简单来说，就是太阳的巨大磁场被用来进行自我维持，所以，由其驱动的太阳活动周期将会在几十亿年的时间里维持整体上维持极小的变动。
In short, the Sun's large-scale magnetic field is taken to be self-sustaining, so that the solar-activity cycle it drives would be maintained with little overall change for perhaps billions of years.
本文讨论了外磁场微小的变动对等离子体平衡位形的影响，即等离子体的静态稳定性问题。
In this article, the effects of the small magnetic field perturbation on the equilibrium of plasma are discussed (the problem of the static stability of plasma).
本文在优化区域边界的二维电磁场逆问题中，应用高阶有限元，增大了可变动节点的变化范围。
For two dimensional inverse electromagnetic field problems, the range of movable points is extended by use of high order finite elements.
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