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

我有一张计算机展销会的入场券，但是突然有事去不了。

youdao

I buy you lunch and you fix my computer. Is that a fair exchange ?

我请你吃午饭，你给我修计算机，这算是公平交易吧？

《牛津词典》

Today, children and adults at the fair can play new computer games or attempt more traditional games of skill.

如今，儿童和成人可以在展会上玩新的电脑游戏或尝试更传统的技能游戏。

youdao

It looks like something you might find at the bottom of the bargain bin at a computer fair, but this device is being touted as an exciting new way to train the next generation of computer programers.

FORBES: Interest Explodes In Humble 'Raspberry Pi' As Computer Sells Out In Hours

By sorting through its own data, LinkedIn knows that computer engineers migrate back and forth between New York and San Francisco a fair amount.

FORBES: Who Should You Hire? LinkedIn Says: Try Our Algorithm

At the fair she is showing a multi-touch table which works like a computer screen.

ECONOMIST: Innovation