Downeyn.唐尼
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 reference向下引用
downburst wind下击暴流风
downhole video井下视频
downtake stick悬杆式倾斜运输机
downcomer seal降液管液封
down-feather绒羽(动)
down time rate停机时间率
down escalator下降电梯
downlink noise下行链路噪声