One of the most exciting features of the Digital Divide Network website is the ability for every DDN member to have a personal blog(网络日志). Blogs contain journal entries written by the author, who’’s referred to as a blogger. Most blogs display the most recent entry at the top of the Web page, with previous entries below that in reverse chronological order. Blogging has revolutionized Internet publishing in the last several years because it gives everyone with Internet access the opportunity to become an online writer. Whether they want to talk about culture, politics, the Internet or their favorite hobbies, bloggers have popped up everywhere. Experts estimate there are at least five million blogs online today, and every day, thousands of people become bloggers for the first time. Bloggers have different reasons for creating a blog. Some bloggers just like to generate debate. Others use blogging as civic journalists, writing news stories you might otherwise not see in mainstream media. Organizations often use blogs to publish newsletters, or share resources with their colleagues. Even students blog to publish their classroom writings online for peer review. But generally, most people blog because they feel they have something important to say, and are empowered by expressing themselves over the Internet. Whether it’’s a casual hobby or an intense avocation, blogging is a wonderful way to share your ideas with others. There are a variety of blogging tools available to the public. Many of them are fee-based services, while others are free but require the inclusion of advertising on your blog, or require a high amount of technical expertise. Because of this, we decided to create a blogging tool that would allow members of the Digital Divide Network to create their own blogs with an easy-to-use intece that’’s free of advertising. As you’’ll see, our blogging tool is designed for beginners, but experienced bloggers may use it to "mirror" their existing blogs on the Digital Divide Network. What is the author’’s purpose of writing this passage