graded index

例句：

1. 1. The company's performance is graded according to a set of criteria.
   该公司的业绩是根据一系列标准进行评定的。
2. 2.The ranking of the teams was determined by their past performances.
   各队排名是根据他们过去的比赛成绩确定的。
3. 3. The graded index system is designed to provide a more accurate assessment of student performance.
   分级指数系统旨在更准确地评估学生的学习表现。