单词primary-rainbow
网络: 虹；主虹；正虹
It is indicated according to the analysis of four cases that a great optic ring accompanied by glory is not always a primary rainbow.
根据四个宝光实例的分析，指出峨眉宝光的伴生大光环并不都是主虹。
The diagram above also explains why the colour sequence is reversed when compared with a primary rainbow.
上图亦说明了为什么霓的颜色排列次序跟主虹是相反的。
Why is the region outside the primary rainbow much darker than that inside the primary rainbow?
为什么主虹之外面总是较里面暗？
In the photo above, do you notice that the region outside the primary rainbow looks much darker than that inside the primary rainbow?
在上面的照片中，你有否留意到主虹外侧的区域较主虹内侧为暗？