Definition: used to show that you wish something was not true or had not happened Level: B2
那是一个不幸的错误。
That was an ___unfortunate mistake.
很不幸，她丢了工作，就在她丈夫生病的时候。
It was so ___unfortunate that she lost her job just as her husband became ill.
很遗憾，他没能通知你关于会议的事。
It is ___unfortunate that he couldn't inform you about the conference.
