grad with teeth

例句：

1. 1. The grading of the work is based on its quality and complexity.
   工作的质量与复杂性决定了其评级。
2. 2. He was promoted to a higher grade in his company.
   他在公司被提升到更高的职位。
3. 3. The students were divided into different grades for their classes.
   学生们根据年级被分到了不同的班级。