translation.en: And with the rise of social media and social networks in the early 2000s, the web was completely changed to a place where now the vast majority of content we interact with is put up by average users, either in YouTube videos or blog posts or product reviews or social media postings.
translation.zh: 但在二十一世纪初 随着社交媒体以及社交网络的兴起， 网络发生了翻天覆地的变化： 如今网络上大部分的互动内容 都是由大众网络用户提供， 既有Youtube视频，也有博客文章， 既有产品评论，也有社交媒体发布。