a bitter disappointment的用法和样例：
- Losing the match was a bitter disappointment for the team.
- If he failed, it could be a bitter disappointment to his parents.
- Some of the storms of life come suddenly: a great sorrow, a bitter disappointment, a crushing defeat.
- It was a bitter disappointment to them to be told that their toilsome journey had been made in vain.
- The defeat was a bitter pill to swallow.