Something's come up unexpectedly

　　突然出现了一些意外情况

　　例句

　　Hey, I'm really sorry, but something's come up unexpectedly and I won't be able to make it to the meeting this afternoon.

　　我真的很抱歉，出了点意外，我不能参加今天下午的会议了

　　Sudden matter

　　突发事件

　　例句

　　I have to leave the office early today because of a sudden matter.

　　今天我得提早离开办公室，因为发生了突发事件。

　　Have an unexpected matter to attend to

　　突发事情需要处理

　　例句

　　I'm afraid I can't join you for lunch today. I have an unexpected matter to attend to.

　　恐怕我今天不能和你们一起吃午饭了。我有突发事件要处理

　　Last-minute issue

　　意外问题

　　例句

　　I won't be able to make it to the party tonight due to a last-minute issue.

　　由于临时有事，我无法参加今晚的聚会。

　　Unforeseen circumstances

　　未预料的情况

　　例句

　　I'm sorry, but I won't be able to attend the workshop due to unforeseen circumstances.

　　很抱歉，由于意外情况，我无法参加研讨会了。

　　Unexpected event

　　意外事件

　　例句

　　Unfortunately, an unexpected event has come up and I won't be able to make it to the appointment.