遗憾的是没有早些报警。

It is regrettable that the police were not informed sooner.

《牛津词典》

遗憾的是，没有下雪。

Unfortunately, there was no snow.

youdao

但遗憾的是，没有哪个中央计划系统能知道人们什么时候需要去哪儿，以及他们的行程有多大价值，这只有当事人自己才知道。

But sadly, no central planner can know which people need to go where when and how much value should be attached to each trip. Only the individuals themselves know this.

youdao

The third derivative, unfortunately, was never given a name, and I don't know why.

遗憾的是三阶导数没有专门的名称,我也不知道这是为什么

耶鲁公开课 - 基础物理课程节选