downern.镇定剂；令人沮丧的人或事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 milling顺铣downproofingn.浮水法；防溺法down garment羽绒服装down counter降值计数器,减法计数器downspoutingn.溜槽down aileronn.下偏副翼Downton pump达温特曲柄式手摇泵,当通手摇泵,邓通曲柄手摇泵down to dateadj.当今的(现代化的)down cutting顺铣,同向铣down and outadj.穷困潦倒的；(拳赛)被击倒地