v.使降低；使降职；贬低；低估 变形： 过去式：downgraded过去分词：downgraded现在分词：downgrading第三人称单数：downgrades 双语释义：v.(动词)vt. 使降低，使降级demote,reduce,relegate英英释义： downgrade[ 'daunɡreid ]n.the property possessed by a slope or surface that descendsv.rate lower; lower in value or esteem