concurrent courses

例句：

1. 1. Students are required to take concurrent courses in both mathematics and science.
   学生被要求同时学习数学和科学。
2. 2.The university offers a variety of concurrent courses that cater to all levels of learners.
   该大学提供多种同时进行的课程，以满足所有学习者的需求。
3. 3.Many students choose to enroll in concurrent courses to enhance their academic performance.
   许多学生选择参加同时进行的课程以提高他们的学术表现。