choppy grade

例句：

1. 1.The students were given different levels of difficulty in the exams.
   学生们在考试中被给予了不同难度级别的题目。
2. 2. The company has implemented a choppy grade system to evaluate its employees' performance.
   该公司实施了一个不均等的等级制度来评估员工的表现。
3. 3.The teacher noticed that some students had achieved higher grades than others, indicating a choppy grade system.
   老师注意到有些学生的成绩比其他学生高，这表明存在一个不均等的等级制度。