a scratch dinner的用法和样例：
- There is just time for a scratch dinner before we have to catch the train.
- The reform has hardly made a scratch upon the cuticle of affairs.
- The only slight imperfection in this painting is a scratch in the corner.
- I can heal a scratch from a fishbone in 24 hours.
- Drouet felt a scratch in his throat.
- He escaped without a scratch, ie completely unhurt.