柯林斯词典dan /dæn/ 1. N a small buoy used as a marker at sea 小浮标 (Also called dan buoy)dan /dæn/ N →comparekyu 1. N any one of the 10 black-belt grades of proficiency 段; 竞技项目的等级[martial arts] 返回 dan剑桥词典one of the ten higher levels in judo or karate （空手道或柔道的）段 someone who has achieved one of the ten higher levels in judo or karate （空手道或柔道的）入段选手 返回 dan