环天顶弧
- n.circumzenithal arc
- 网络the circumzenithal ares
环天顶弧环天顶弧
circumzenithal arc
环天顶弧(circumzenithal arc)的现象为在天空中形成如倒挂的彩虹一般的七色圆弧。其颜色顺序自下而上分别为：红、橙、黄、 …
the circumzenithal ares
弧顶,top of the... ... ) top position of the arc 顶弧位置 ) the circumzenithal ares 环天顶弧 ) arc vertex 弧顶点 ...