You took an optional course this semester, didn't you?

你这学期选了一门选修课，是吗？

youdao

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。

youdao

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。

youdao

Razer had to change more than Project Fiona's name to stay under budget, of course -- the prototype's handlebar controllers have migrated to an optional gamepad dock.

ENGADGET