translation.en: But what's key here is, the reason these groups have been able to connect is because their work output is of the type that can be easily shared digitally -- a picture, a music file, software.
translation.zh: 而这里关键是 这些群体之所以可以链接起来 是因为他们的作品是 可以用数字方式共享的产品 例如照片， 音乐文件 和软件