众所周知，手机已经变成了人们生活中不可缺少的一部分。而手机也在不停的发展。
下面我我要做的演讲就是关于手机的变化。
在最近的几年，越来越多的人拥有了手机，手机也有了巨大的变化。
首先，在外形上，手机变得越来越漂亮和时尚。21世纪，许多人开始注重手机的外形，所以许多手机公司设计了不同的手机形状。随着社会的发展，人们的审美观开始改变，越来越多的人开始关注手机的外形。而这些年科技水平也有的了巨大的发展，于是许多公司便开始改变手机的外形，通过漂亮的外形来吸引顾客。例如iPhone，2007年苹果公司推出了一款名叫iPhone手机，这款手机风靡全世界，数以万计的人被它的外形所吸引。iPhone的外形十分的简单和流畅，这也成为了手机外形设计的一种标准。
另外，手机的功能在逐渐的变化---手机功能的变化也可以说成是手机系统的变化。手机功能是随着手机系统的不断升级而不断的增加的。
在手机刚刚出现的那几年里，手机主要是用来打电话和发信息的，随后一些手机开始加入一两个小游戏来吸引消费者。最近几年，一大批的手机开发商研制出了智能手机系统，智能系统给手机带来了许多功能例如上网，发电子邮件，听歌，看电影，玩游戏，网上购物，等等。
事实上，手机最初的一些改变是由于手机公司想要通过改变手机外形不同来吸引消费者。而最近的几年，随着科技的发展，这些公司通过给手机添加不同的功能来吸引消费者。
人们改变了手机，而手机也改变了人们的生活方式。以前，人们需要通过电脑来发送邮件和制作文档，用MP3听歌，而现在我们能够通过手机来做这些事情。手机科技的发展，然人们的生活越来越方便。而人们也越来越离不开手机

As all we known， the cell phone has become a indispensable part in our life .But cell phone is also developing all the time.
Now i am going to make a speech about the change of cell phone.
In recent years,more and more people owe cell phones and the cell phones have changed a lot.
First of all, cell phone becomes more and more beautiful and fashion in shape.In the 21st century, more and more people begin to pay attention to the appearance of cell phones.So Many cell phone companies design different  cell phone shapes.With the development of society, people's aesthetic standard began to change and more and more people begin to pay close attention to the appearance of cell phones. Technological level also had a huge development in these years,so many companies began to change the appearance of cell phone to attract customers by  beautiful appearances.Such as iPhone , in 2007  apple company launched a new cell phone named iPhone ,this phone spread all over the world, tens of thousands of people were attracted by its appearance. The appearance of iPhone is very simple and smooth, it has become a  standard of designing cell phone appearance. 
In addition, the function of cell phone is in the gradual changes.The changes of cell phone function also can be said the changes of cell phone system.The cell phone function is increasing constantly  as the cell phone systemconstantly upgraded.In that several years of cell phone fledgling , cell phone was mainly used to make a phone call and send messages, then some phones started adding one or two small games to attract consumers. In recent years, a large number of cell phone developers developed smartphone system, the intelligentsystem  brought many functions such as Internet and E-mail, music, movies, play games, online shopping, and so on to cell phone.
In fact, some of the  original change of cell phone is because of that the mobile phone companies want to  attract consumers by changing the different cell phone appearance.But in recent years, with the development of science and technology, these companies attract consumers through adding  different phone functions.People change cell phone, and cell phone also changed people's life style. In the past, people need  to send mail and producted documentation through the computer.we listening to music with MP3.But now we can do these things through phones. Cell phone technology development make the life of people more and more convenient. And people have more and more inseparable from mobile phones 

• addition [ə´diʃən] n.加；加法；附加物 (初中英语单词)
• function [´fʌŋkʃən] n.机能；职责 vi.活动 (初中英语单词)
• constantly [´kɔnstəntli] ad.经常地；不断地 (初中英语单词)
• system [´sistəm] n.系统，体系，制度 (初中英语单词)
• mainly [´meinli] ad.主要地；大体上 (初中英语单词)
• intelligent [in´telidʒənt] a.聪明的；理智的 (初中英语单词)
• convenient [kən´vi:niənt] a.方便的 (初中英语单词)
• indispensable [,indi´spensəbəl] a.绝对必要的 (高中英语单词)
• gradual [´grædʒuəl] a.逐渐的 (高中英语单词)
• inseparable [in´sepərəbəl] a.分不开的 (英语六级单词)