grade A甲级graden.等级；年级；成绩；斜坡v.分级；评分；渐次变化Graded Bass Rings and Duality分次Bass环及其对偶grade correlation coefficient等级相关系数Graded-index optical fibers梯度型光纤grade of copper concentration铜精矿品位graded professional education等级的职业教育graded insulation transformer分段绝缘变压器grade changing of main member主材变坡grade-separated interchange立体交叉grade physics experimentation分级物理实验graded impurity concentration缓变杂质浓度