我们遗憾地通知您，您的奖学金申请未获批准。

We ___regret to inform you that your application for the scholarship has been unsuccessful.

管理层对活动因不可预见的情况而延期表示抱歉。

The management ___regrets that the event has been postponed due to unforeseen circumstances.

我很抱歉地通知您，您的订单交付将有延迟。

I ___regret to inform you about a delay in the delivery of your order.