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遗憾地, 懊悔地
used to express a sense of sorrow or remorse
- Regretfully, we have to inform you that the event has been canceled due to unforeseen circumstances.
遗憾地, 我们不得不通知您，由于不可预见的情况，活动已被取消。
- Regretfully, the error in the report was not noticed until after its distribution.
遗憾的是，报告中的错误直到分发后才被注意到。
- I regretfully informed them that the reservation had to be canceled due to unforeseen circumstances.
我遗憾地通知他们，由于 unforeseen circumstances，预订不得不取消。
- She regretfully accepted that the project would need additional time to meet the desired quality standards.
她遗憾地接受了这个项目需要更多时间才能达到理想的质量标准。