It only works when it is a genuinely new form of communication (webmail, social networking, microblogging).

而仅当确实是交流的新形式(web邮箱，社会网络，微博客)时，病毒营销才起作用。

youdao

It only works when it is a genuinely new form of communication (webmail, social networking, microblogging).

而仅当确实是交流的新形式(web邮箱，社会网络，微博客)时，病毒营销才起作用。

youdao