1 having a belief or a way of behaving that will not change 中坚的；骨干的；顽固不化的: hard-core conservatives 顽固不化的保守分子

2 showing or describing sexual activity in a detailed or violent way ﹙性描写﹚露骨的，赤裸裸的: They sell hard-core pornography. 他们卖赤裸裸的色情物品。