“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	The Art of Chinese Ritual Masks The Art of Color The Art of Dramatic Writing the art of flower arranging the art of landscape plant The Art of Museum Exhibitions:How Story and Imagination Create Aesthetic Experiences The Art of Pingtan the art of weak application the arts and crafts of Qing dynasties The arts must serve the people and serve socialism. the arts of forgery The Asahi Gramophone Co., Ltd. The Ascent of F6 the Asean-Australia-New Zealand free trade agreement The Ashes The Asian Association for Lexicography The Asian Society of International Law The Asia-pacific Traditional Medicine The Asiatic Society The Assassin the assassination of Song Jiaoren The Asscociated Press Statement of News Values and Principles The Assemble of Acupuncture and Moxibustion The Assembly The Assessment Methods Of Physical Education In Primary And Middle Schools

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