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-hole motor螺杆钻具down-look radar俯视雷达down-proof cloth防羽绒布down link equation下行链路公式down-filled coat羽绒衣down belt conveyor下运带式输送机down-and-outern.被击垮的人Down Range up Link下靶场上行线路downhole operation井下作业DowneyRobert Jr.小罗伯特·唐尼