the small central group in an organization, or in a particular group of people, who are the most active or who will not change their beliefs or behaviour核心力量;骨幹;中堅力量
It’s really only the hard core that bother(s) to go to meetings.也只有那些骨幹分子願意去開會。
A hard core of drivers ignore(s) the law.部分頑固的駕車人無視這項法律。
A hard core of supporters, mostly teenage girls, gathered at the airport to see the star arrive.支持者的中堅分子大多是十幾歲的女孩子,聚集在機場一睹這位明星的到來。