droptv.放下；掉下vbl.dropvt.落下；跌倒；下降；放弃；漏掉；断绝关系n.滴；微量；减少；滴状物drop of milk奶滴dropped goal踢球入门dropped backv.退后(后撤；落后)dropping pit粪沟,粪坑dropin level高差drop crusher冲唤破碎机dropped coal落煤dropped overv.非正式访问(顺便来访)drop pipette滴液吸移管drop the cue进棺材,死亡