短語(yǔ)詞組短語(yǔ)down -grade and up-grade 下坡度與上坡度Concrete Down To Grade 具躰到二級(jí)cut down to grade 挖到設(shè)計(jì)標(biāo)高to cut down to grade 挖至設(shè)計(jì)標(biāo)高dthisgerous down grade 下坡危險(xiǎn)long heavy down grade 長(zhǎng)大下坡道Retarded Down Grade Lane 減速下坡車道on the downgrade 在走下坡路;衰落;每況瘉下 返回 down grade