现在,不论什么样的社交网站总能吸引到数百万的用户,我们称之为“病毒式扩张循环”。简单地说,用户的增长是因为每一个用户都能带来更多的新用户。这中间的小诀窍是,这些网站总会提供一些让人们真正感兴趣的功能,这样人们才会很爽快地把它介绍给自己的亲朋好友。 Now, no matter what kind of social networking sites can always attract millions of users, we call it a “viral expansion cycle.” Simply put, the user’s growth is because each user can bring more new users. The trick here is that these sites will always provide some of the features that people are really interested in, so that people will be very readily introduced to their friends and family.