a black-and-white print的用法和样例：
- The boy is playing a black and white football.
- Sorry,this roll can only be developed for black and white prints.
- Sorry, this roll can only is developed for black and white prints.
- Which is more expensive,a black and white tv or a colour one?
- I'm sorry, but I can't give you a black and white answer.
- There is a black and white television set in my family.