音乐会被取消了，原因是出现了未预见到的情况。

The concert was cancelled due to ___unforeseen circumstances.

由于一次未预见到的日程冲突，会议被推迟了。

The meeting was postponed because of an ___unforeseen scheduling conflict.

我们需要预留一些额外预算，以备意料之外的开支。

We need to have some extra budget set aside for ___unforeseen expenses.