bortn.(名词)Poorly crystallized diamonds used for industrial cutting and abrasion.下等金刚石,工业用钻石:结晶很差的金刚石,用于工业切割和研磨A carbonado.黑金刚石来源:Probably from Dutch boort 可能源自 荷兰语 boort 【引伸】bort.yadj.(形容词)