必修课程

例句：

1. 1. All students must take the required courses in mathematics and science.
   所有学生都必须学习数学和科学。
2. 2. The university offers a wide range of elective courses for students to choose from.
   大学为学生提供了广泛的选修课程供选择。
3. 3. Many high schools require students to take at least one core subject as their mandatory course.
   许多高中要求学生至少学习一门核心科目作为他们的必修课程。