Thereafter, we introduce the main achievements with magnetic elements and sunspot magnetic fields as examples.

接着以磁元和黑子磁场为例，介绍现有的主要研究成果。

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Last year, he and colleague Matt Penn pointed out that the average strength of sunspot magnetic fields has been sliding dramatically since 1995.

去年，他和同事Matt Penn指出，太阳黑子磁场的平均强度从1995年起，已经急剧下滑。

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