短語詞組短語down -grade and up-grade 下坡度與上坡度Concrete Down To Grade 具體到二級cut down to grade 挖到設(shè)計標高to cut down to grade 挖至設(shè)計標高dthisgerous down grade 下坡危險long heavy down grade 長大下坡道Retarded Down Grade Lane 減速下坡車道on the downgrade 在走下坡路；衰落；每況愈下 返回 down grade