a good stock of jokes的用法和样例：
- She's built up a good stock of teaching materials over the years.
- Supply of material ready for use He has a good stock of information.
- We always keep a good stock of drink on hand in case we have unexpected visitors.
- Always keep a good stock of fresh fruits and vegetables in your refrigerator so that you are always prepared to eat healthily.
- He delivered himself of a good joke.