“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	organic light emitting diode display device organic light emitting diode display technique organic light emitting diode electrode material organic light emitting diode, OLED organic light-emitting diode (OLED) organic light-emitting diode, OLED organic light emitting diodes display device organic light emitting display organic light emitting display method organic light emitting display, OLED organic light emitting driving technology organic light emitting materials organic light emitting modulation technology organic light emitting pixels organic light-emitting testing technology organic light emitting transistor organic liquid crystal material organic magnetic field effect organic magnetic material organic magnetic polymer material organic magnetoresistance organic magneto-semiconductor organic mass spectrometry organic mass spectrometry for pharmaceutical analysis organic mass spectrometry (OMS)

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