敲诈勒索: blackmail and impose exactions on; carry out extortion; exact extortionate prices; extort and racketeer; extort money by [under] false pretenses; extort money from sb.; force sb. to pay by
集团: group; clique; circle; ring; bloc 短语和例子军事集团 a military bloc; 七十七国集团 the group of 77; 知识分子领导集团 an intellectual leadership group; 东欧集团 the eastern european bloc; (二次世界大战中的)轴心集团 the axis bloc
