Cách sử dụng
Rainbow is a very beautiful and colorful natural phenomenon that is caused by sunlight passing through raindrops. It is a semicircular arc of colors, usually seen in the sky when there is rain and sunshine at the same time. We use the word rainbow to describe something colorful and bright, such as a dress or painting. The word rainbow can also be used figuratively to describe a broad range of emotions or ideas, for example, "She has a rainbow of interests."