minor grade

例句：

1. 1. The studentneeds to take a minor grade in mathematics before he can graduate.
   这个学生在毕业前需要先修读一门次要的数学课程。
2. 2. The company has introduceda new minor grade for its employees toimprove their skills.
   该公司为员工引入了一个新的次要级别，以提升他们的技能。
3. 3.The minor grade system is designed to helpstudents understand the importance of learning and progressing through different levels.
   次要级别制度旨在帮助学生理解学习的重要性以及通过不同级别的进步。