regrettably
01
遗憾地, 不幸地
in a manner expressing sorrow, disappointment, or a sense of apology
例子
Regrettably, due to unforeseen circumstances, the outdoor event has been canceled.
遗憾的是, 由于 unforeseen circumstances, 户外活动已被取消。
The manager informed the team that, regrettably, the project deadline would need to be extended.
经理通知团队，遗憾的是，项目截止日期需要延长。
