a colourful world的用法和样例：
- My ideal is to be an artist, I want to draw a colourful world with my brush.
- I love the season of autumn. It is the season for harvest. It is a colourful world.
- Try to wear a colour that is less obtrusive.
- He launched out into a colourful description of his journey.
- I changed my black and white television for a colour set.