“成群的”的英语可以翻译为：[计] clustered，agminate ...

他没法躲开成群的记者。He could not escape the massed ranks of newsmen.他所到之处都有成群的歌迷簇拥着他。Every-where he went he was mobbed by a crush of fans.警方的行动被成群的记者所妨碍。The police operation was encumbered by crowds of reporters....