Dropet德罗佩dropvt.落下；跌倒；下降；放弃；漏掉；断绝关系n.滴；微量；减少；滴状物dropping packets丢包drop from heaven从天上掉下来drop-ping zone伞降地域droppable engine可投发动机drop their guardvi.丧失警惕drop evaporation单南蒸发drop the subject别扯了; 不再谈此事; 放弃这个问题drop bottom cage落底式罐笼Drop hammer type落锤式drop in pressure压力降低