不幸的副词英语怎么表达？

　　Unfortunately, there is nothing we can do to improve matters.

　　很遗憾，我们无力改善目前的状况。

　　I can't make it, unfortunately.

　　很遗憾，我来不及。

　　Unfortunately, these findings do not hold true for women and children.

　　遗憾的是，这些调查结果不适用于妇女和儿童。

　　Unfortunately, the people making the decisions are out of touch with the real world.

　　令人遗憾的是，制订决策的人不了解实情。

　　Unfortunately, I won't be able to attend the meeting.

　　真可惜我不能参加这次会议。