an organization set up in order to publish a large number of messages or posts on the internet, that often appear to be from people who do not really exist, and that are intended to cause trouble, influence political views, etc.

The building was said to house a troll factory involved in a campaign of disinformation and propaganda. 据说这栋楼里有一个喷子工厂，他们参与了一次虚假信息宣传活动。