a didactic story的用法和样例：
- The reporter had a red-hot story.
- Prejudice determines the relativity and absoluteness of understanding,which is a didactic unity of the two.
- Alexander Pope(1688-1744) An Essay on Criticism is writen by Alexander Pope,it is a didactic poem written in heroic couplets.
- These scenes had a didactic and admonishing function, not only for the common people but for the judges who resided in the building as well.