You took an optional course this semester, didn't you?
你这学期选了一门选修课，是吗？
By setting Peking Opera as an optional course, students may have more freedom to decide whether to take it or not.
通过将京剧设置为选修课，学生们可以有更多的自由决定是否选修京剧。
Can university set such an optional course for us?" attracted lots of attention on the BBS of a Wuhan-based university.
武汉某高校的论坛上出现了这样一篇帖子。
A potential employer might not get to find out that the engineering student scored top marks in an optional course in Spanish or excelled in a particular aspect of the course.
一个潜在的雇主可能无法了解某个工科学生在选修课程西班牙语上获得了高分，或者在课程上的某一方面有出色的表现。
Volleyball is an optional course which teaches students the history and development of this sport.
排球是一门选修课程，通过本课程的学习，学生可以充分了解排球的历史以及发展趋势。
For those students who are interested, there is an optional course in car maintenance.
为那些感兴趣的同学开了一门有关汽车维修的选修课。
The results show that it is necessary to set up physics for arts student as an optional course.
从结果看，有必要把文科物理设为公选课。
The results show that it is necessary to set up physics for arts student as an optional course.
从结果看，有必要把文科物理设为公选课。
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