1——Do you know much about computers？
2——Not a great deal.
1——I've just been reading an article about them. They are used for all sorts of things now.
2——For accounting systems and things you mean？
1——Yes， but they're used for other things too. Do you remember when we went to buy our tickets for the flight to Greece？
2——Yes.
1——The man asked where we wanted to go， then he typed out the information on a form and waited for a reply. A few moments later he gave us our tickets.
2——Of course. His machine must have been connected to a computer.
1——That's right.
注解：
1）computer：计算机
2）Not a great deal=not very much，全句是I don't know a great deal about computers.
3）accounting systems：财会系统。
4）must have been connected to a computer：must+完成体的不定式动词用以表示说话人对以往事情的猜测或推断。
译文
1——你对计算机很在行吗？
2——不算特别在行。
1——我刚读了一篇关于计算机的文章。计算机可用于各种事情了。
2——你是说财会之类的事儿？
1——是的，但也用来干别的事情。还记得我们去买飞往希腊的机票吗？
2——是呀。
1——那个人问我们要去哪儿，然后他把情况大在一张表上，等待答复。过了一会儿，他就把机票给咱们了。
2——是的。他的机器一定是和一台计算机连着的。