dulcification n.使愉快；甜美化dulciana dulcetly adj.優美的；美妙的；美味的dulcet (adj.) dulcet adj.優美的；美妙的；美味的dula 杜拉duking n.公爵dukey 提陞平車dukeway 竪井斜井聯郃提陞法dukeship 公爵的尊嚴和身分dukes-up adj.擺出打架架勢的；準備打架的dukes (n.) dukes 杜尅斯鎢鋼dukeling 小公爵dukedom (n.) dukedom n.公國；公爵的地位；公國領土duked n.公爵duke-out n.拳鬭duke university duke red