1 class 等级;种类;类别first-class 一流的2 grade(1)(产品,材料)的等级----All the materials used were of the highest grade.(2) 官衔级别-----She's still only on a secretarial grade.(3)评分等级-----She got good grades in her Exams.3 hierarchy 社会等级---She is high up in the management hierarchy.