假设你是李明，你的一个朋友张伟准备到你所在的城市来旅游，但你有事不能接待。写封信给他，解释你不能接待的原因，并说明你所做的`安排。
Dear Zhang Wei,
Im glad to know that you are coming to my city during the summer vacation.
However, Im afraid theres some bad news. Im planning to take part in an international conference to be held in another city during the time of your visit. All the top scientists in my field will show up at the conference. More importantly, Im lucky enough to have been selected to give a speech on behalf of my research team at the Conference. I really cant miss it.
I understand that itll be your first time to this city and Im your only friend here. Ive asked my roommate to meet you at the airport, and you can stay in my room. He is a very nice person and he will show you around the city. Hope you two will get on well and have a nice holiday!
Yours,
Li Ming
Electronic mail, E-mail for short, is a new way of communication by means of computers.Because it is fast, cheap and convenient, it is a very popular means of communication.
电子邮件，简称E-mail， 一种新的通过电脑的交流方式， 因为它迅速，便宜和方便，它是一种非常受欢迎的通讯方式。
Millions of computers all over the world have been connected to form a global network, namely the Internet. You can send or receive letters to people anywhere. You can also store, and compile information. In a word, E-mail helps you overcome spatial and time limitations in communication.
全世界上百万台电脑连接在一起形成了一个全球网络，即互连网。你可以向任何地方的人发送和接收信件，你还可以存储，删除和编辑信息，总之，电子邮件帮助我们克服通信上的时空限制。
With the rapid growing popularity of computers and expansion of information highway, E-mail is expected to play a more and more important role in our lives.
随着电脑的越来越流行和信息高速公路的膨胀，电子邮件有望在我们的生活当中起着越来越重要的作用。
