downwardadv.向下adj.向下的;下降的
downward phase[经] 下降阶段
downward bulge向下凸出
downward trend看跌
downward system下行系统
downward mining下行开采
downward spiral不断下降,螺旋式下降
downward squint下斜视
downward market下跌行市
downward stroke下行冲程
downward welding平焊,俯焊