graded broken stone

例句：

1. 1. The students were graded on theirperformance in the exams.
   学生们根据他们在考试中的表现被分级。
2. 2. Thecompany has a system forgrading its employees basedon their performance.
   该公司有一个基于员工表现的评级系统。
3. 3. The graded sectionsof the road are marked with signs.
   道路的分级部分用标志标出。