我有一张计算机展销会的入场券，但是突然有事去不了。

You have got a ticket to a computer fair, but you now find that you are unable to go.

youdao

我有一张计算机展销会的入场券，但是突然有事去不了。

You have got a ticket to a computer fair, but you now find that you are unable to go.

youdao