sludge slQJ n [U] soft wet earth or earth-like matter 烂泥， 糊 We seemed to spend the last mile of the walk knee-deep in sludge. 我们似乎在没膝的烂泥中走完最后一英里路。 Sometimes a mixture of sewage sludge is spread directly on farmland as fertilizer. 有时，污水淤泥混合物被直接施撒在田地里作为肥料。