regrettable

1. ADJ You describe something as regrettable when you think that it is bad and that it should not happen or have happened. 不幸的[正式]

The army said it had started an investigation into what it described as a regrettable incident. 軍方說已經開始調查這起據稱的不幸事件。

2. regrettablyADV 不幸地

Regrettably we could find no sign of the man and the search was terminated. 不幸，我們無法找到這個人的任何蹤跡因此搜尋停止了。