Downtonn.唐顿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 on this killin floor.这一击杀伤楼.down-the-hole air hammer潜孔冲击器Down In Flames Eastern Front坠入战火之东部前线down hole dynamic compaction孔内深层强夯桩downhole reinjection systems回注系统Down with the moral majority那些多数派手下的傀儡down-the-line-renewnals续约费用downhole pre-warning system井下预警系统downhole oil water separation井下油水分离器downhole blow-out preventer井下防喷器