“periodic variation of corona”的概念、定义、翻译、参考文献-科学参考

单词	periodic variation of corona
释义	periodic variation of corona Encyclopedia 理学太阳物理学释 periodic variation of corona日冕周期变化日冕的形状同太阳活动周期有关：在相对黑子数极大时，日冕近于圆形；而在黑子数极小时则较扁，赤道区延伸较远，两极区延伸较近，且有羽状物。因此，日冕的形状也与黑子数一样，有11年的变化周期。
随便看	abundance effect abundance gradient abundance of element abundance of elements abundance of organic matter abundance ratio abundance sensitivity abundance standard star abundance zone abundancy abundant number Abundant Treasure Pagoda of the Guangde Temple Aburi Botanical Garderns abuse abuse of dominant market position abuse of fundamental rights abuse of intellectual property rights Abushiri Revolt Abu Simbel Temples abusive supervision abutment abuttal abuttals，land boundary a butterfly-shaped pair of screens hanging on both sides of a stage Abu Utman

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