Downlen.唐尔
downadv.向下prep.沿着 ... 而下adj.向下的;消沉的;无礼的n.绒毛;汗毛v.击倒;打败;吞下;被抑制
down and out call向下触销型
down in the dumps气馁; 沮丧
down-draft barn气流下降式烤房
down on your luckadj.倒霉的(不走运的;处境困难的)
down at the mouth神情沮丧; 垂头丧气
down-feed riser下供式立管
down-flow apron[化] 降液挡板; 降液裙板