That's because the red light is actually not a gross constituent unit in a semiotic system, right?
那是因为红灯不是这一符号系统的一个主要组成单元，对吗？
2
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.
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。
3
Each constituent of the tissue, such as capillaries, glands and collagen, will scatter light or absorb light in different ways.