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downlock pin下位锁保险销Down convert下变频downpunching沉陷down grading品位降低down at heeladj.穿得把后跟磨掉了(邋遢的；处境穷困的)Downey cells多尼细胞:传染性单核细胞增多症时必然存在的三种非典型淋巴细胞down fitting下拟合down a plane击落飞机down-group下组down loading卸荷