dredge

（用挖泥船等）疏浚；（用拖捞网等）捞取；（在食物上）撒（面粉等）英释中释vto cover food lightly with flour, sugar etc

挖泥船，疏浚机；拖捞网英释中释na machine, in the form of a bucket ladder, grab, or suction device, used to remove material from a riverbed, channel, etc

1 dredge up,v. 疏浚；回忆起

2 dredge pump,吸泥泵；挖泥泵；排泥泵；泥浆泵

3 grab dredge,抓斗式挖泥船

1 They dredged for oysters..他们在挖牡蛎。