a sorry excuse的用法和样例：
- He cut a sorry figure after his long illness.
- The crew were in a sorry plight by the time they reached shore.
- Nobody would listen to your sorry excuse.
- a sorry horse; a sorry excuse; a lazy no-count,good-for-nothing goldbrick; the car was a no-good piece of junk
- We are in a sorry plight, tired, lost and hungry.