a graceful apology的用法和样例：
- Miss Arena has a graceful, sedate manner.
- They withdrew their objections with as good a grace as they could manage.
- She is a graceful girl. She dances with grace.
- His refusal was worded in such a graceful way that we could not be offended.
- The stairs in the hotel ascend in a graceful curve.
- The stairs ascended in a graceful curve.