1. It means to see the rainbow after the storm, persistence is victory, and suffering is rewarded.
2. Rainbow is always short-lived.
It can be said that beauty is not eternal.
In other words, it is worthwhile to work hard for a beautiful moment.
3. Rainbow does not exist independently. Sunlight, water vapor and even observation angle will have an impact on it.
You can't see the rainbow every time it rains, but if you pay attention, you will see it one day.
5. Rainbow is the decomposition of white light. A single white light is actually gorgeous, and gorgeous colors may be pale when put together.
6. rainbows don't just appear after rain
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A lot, but some are not easy to write, but once written, it will be fine.