According to college curricula, students have to finish some compulsory courses and selective courses.

根据学校的课程安排，学生需要完成必修课和选修课的内容。

But, as a matter of fact, college students have spent years in taking compulsory courses and selective courses, how can they accumulate required experience in college?

但是，事实上，大学生上了许多年的义务教育，以及选修课程，那么，他们又如何在大学获得实践经验呢?