grading work

例句：

1. 2.
   对工作、课程等
2. 3.
   对产品等
3. 1. The teacher gave the students a grade for their homework.
   老师给学生的作业打了分。
4. 2.The company is conducting a quality rating of its products.
   公司正在对其产品进行质量评级。
5. 3. After the test, the students will receive a grade on their performance.
   考试后，学生们将根据表现获得分数。