双重彩虹的产生是由于光线不止一次地被大气中的水滴所反射。
Double arcs happen when light is reflected more than once in an atmospheric water droplet.
月虹与白天出现的彩虹一样，是光通过水滴分解成多种色光后产生的，而光本身是由多种色光组成的。
Like a rainbow, its daylight equivalent, a moonbow is produced when light is broken up into its constituent colours as it passes through water droplets.
彩虹是阳光透过天空中的小水滴时形成的。
Rainbows are formed when sunlight passes through small drops of water in the sky.
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