clean out the bed of (a harbour, river, or other area of water) by scooping out mud, weeds, and rubbish with a dredge
（用挖泥船）疏浚（港湾、河道等水域）。
bring up or clear (something) from a river, harbour, or other area of water with a dredge
挖掘；捞取
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mud was dredged out of the harbour 泥土被从港湾里挖掘出来
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[no obj.]
they start to dredge for oysters in November .他们从十一月开始采捞牡蛎。
(
〈喻〉 揭（疮疤）；翻（旧账）
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I don't understand why you had to dredge up this story .我不明白你为什么要翻出这陈年旧账。
an apparatus for bringing up objects or mud from a river or seabed by scooping or dragging
挖掘机；挖泥船。
sprinkle (food) with a powdered substance, typically flour or sugar
把面粉（或糖粉等）撒在（食物）上
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dredge the bananas with sugar and cinnamon .在香蕉上撒上糖和桂皮。
"late 15th cent. （as a noun; originally in