虹彩

例句：

1. 1. The sun sets over the ocean, painting the sky with a rainbow of colors.
   太阳落山，把天空染成彩虹色。
2. 2. The children were thrilled to see the rainbow in the sky.
   孩子们看到天空中的彩虹时非常高兴。
3. 3. Rainbows are a symbol of hope and promise in many cultures.
   彩虹在许多文化中象征着希望和承诺。