1. periodic variation of corona 
   日冕周期变化
2. radio wave scattering of the solar corona 
   日冕的电波散射
3. Of or relating to a corona, especially of the head. 
   冠部的有关冠部的，尤指头部的
4. A constellation in the Northern Hemisphere near Lyra and Corona Borealis. 
   武仙星座位于北半球的一个星座，位于天琴星座和北冕星座附近
5. A faint glow enveloping the high-field electrode in a corona discharge, often accompanied by streamers directed toward the low-field electrode. 
   电晕在电晕放电中在高压电极出现的一种微弱光辉，常伴随有朝向低压电极的电流

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