a litter-strewn playground的用法和样例：
- There was litter strewn all over the pavement.
- Our cat has a litter of four kittens.
- His dog hasn't had a litter of puppies.
- His litter strewn room really needed to be cleaned.
- Even abe smiled, but only a litter and not for long.
- Her desk was covered in a litter of books and papers.