a saving grace的用法和样例：
- Her sense of humor has to be a saving grace.
- She found is a saving grace in Fleur that having set her heart on a thing,she had no change of heart until she got it.
- As a saving grace, counter-cyclical measures aside, we would be compelled to restore long-term fiscal order.
- make him out to be without a saving grace
- A saving of 30% is obtainable under this scheme.