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1.The sunspot penumbra is a fascinating phenomenon that occurs when the sun's surface is obscured by its own corona.
日偏食晕圈是一种迷人的现象，当太阳的表面被其自身的耀斑所遮蔽时会发生。
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2.During this time, astronomers can observe the sunspot penumbra and study its effects on the solar wind.
在此期间，天文学家可以观察日偏食晕圈并研究其对太阳风的影响。
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3.The sunspot penumbra is a key indicator of solar activity, providing insight into the behavior of the sun's magnetic field.
日偏食晕圈是太阳活动的关键指标，为了解太阳磁场的行为提供了洞察。