dulcification n.使愉快；甜美化dulciana dulcetly adj.优美的；美妙的；美味的dulcet (adj.) dulcet adj.优美的；美妙的；美味的dula 杜拉duking n.公爵dukey 提升平车dukeway 竖井斜井联合提升法dukeship 公爵的尊严和身分dukes-up adj.摆出打架架势的；准备打架的dukes (n.) dukes 杜克斯钨钢dukeling 小公爵dukedom (n.) dukedom n.公国；公爵的地位；公国领土duked n.公爵duke-out n.拳斗duke university duke red