grade A甲级graden.等级；年级；成绩；斜坡v.分级；评分；渐次变化graded insulated transformer分级绝缘变压器Gradenigo's fixation forcepsgraded index multimode fiber递级折射率多模式光学纤维graded depolarizing response分级去极化反应graded broken stone pavement级配碎（砾）石路面Grade A Class Three hospital三级甲等医院grade of ecological security生态安全等级graded spherical quantum dot球形梯度量子点graded-index optical fiber渐变折射率光学纤维graded teaching and learning分级教学