interest group
noun [ C ] uk/ˈɪn.trest ˌɡruːp/ us/ˈɪn.trɪst ˌɡruːp/
利益集团
a group or organization with particular aims and ideas that tries to influence the government
There's too much lobbying by special interest groups. 各特殊利益集团进行了太多的游说活动。