grade A甲级graden.等级；年级；成绩；斜坡v.分级；评分；渐次变化grade separation structure立体交叉结构grade characteristic value级别特征值grade duty nursing pattern分层次使用grade of aseismatic design抗震等级graded-index glass fiber渐变折射率玻璃纤维grade-separated crossing立体交叉graded junction transistor缓变结型晶体管Grade of Flood Damage loss洪水灾害灾情等级评价grade of drought and flood旱涝等级Graded reflectivity mirror梯度反射率镜