【答案解析】[范文]
The chart indicates that the number of mobile phone subscriptions has increased both in the developing countries and developed countries. However, while the number of subscriptions in developed countries has undergone a relatively steady change, that in developing countries has risen dramatically, from a little over half a billion in 2000 to 4 billion in 2008. By 2008, the number of subscribers in developing countries is four times as large as that in developed countries.
What has caused such differences in the increase of mobile phone subscriptions? The mobile phone used to be a luxury in developing countries. For example, in China, only the rich people could afford a mobile phone at the beginning of this century, but as the cost in production and transmitting devices is reduced, the price of the mobile phone drops, so that more people could afford and use one. Since the number of people in developing countries is much larger than that in developed countries, it is only too natural that the number of mobile phone subscriptions increases dramatically there.
However, the trend will not be so dramatic in the next decade since many people have already owned at least one mobile phone, so that the increase will become less drastic. [解析] 在第一段一定要对图表进行简单描述，第一句可以概括地指出总的变化趋势，第二句之后再详细描述图表内容，但切忌不要每一年的数字都提，只需要描述一些峰值就够了。表中涉及两组数据，一组是发展中国家手机使用人数的增长情况，另一组是发达国家手机使用人数的变化情况，对二者要进行比较性描述和分析。在进行评论时应该至少提及两个方面，一是造成两种趋势的原因，二是未来的发展趋势。在谈到原因时可以抓住一两个原因做深入分析，也可以列举几个方面的原因。另外，既然写作要求里没有提到要考生为文章起一个题目，因此考生可以直接开始写作。最后，写作此文要善于使用一些比较级的句式。