graded-time step-voltage test

例句：

1. 1. The students are divided into different levels based on their performance.
   学生根据成绩被分为不同的等级。
2. 2. The company has implemented a graduated salary structure to reward employees for their achievements.
   公司实施了分级薪酬结构，以奖励员工的成就。
3. 3.The test is graded on a scale of 1-10, with higher scores indicating better performance.
   测试按照1-10的评分标准进行，分数越高表示表现越好。