a poor memory的用法和样例：
- He has a poor memory after the car accident.
- A poor memory frustrated her efforts to become an actress.
- As for the president himself, we're unlikely to get much: Bush has a poor memory and is too unreflective to have kept the kind of diary that would elucidate matters.
- Grandpa has a poor memory.
- It's a poor sort of memory that only work backwards.