triadn.三个一组；三合会；<音>三和弦triad of the gyro三陀螺组triadic relations三元关系triad interaction三波相互作用triadic Cantor set三分康托集triad homotopy set三元组同伦集triad nomenclature三合会术语triad nuclear force三位一体核力量triadic Cantor dust三分康托尘triadelphous stamen三体雄蕊triad concentration三元组浓度