Tāmen / zhǐ / zài / xiǎo / quānzi / lǐ / tǎolùn / zhège / àihào / suànshì / quāndìzìméng

他们只在小圈子里讨论这个爱好，算是圈地自萌。

They discuss this hobby only within their small circle, keeping it as a private interest.