学生在最后一学年可以自由选修课程。

Students have a free choice of courses in their final year.

《牛津词典》

某些课程是必修的，其他是选修的。

Certain courses are compulsory, others are optional.

《牛津词典》

这门课程包括十个必修单元和五个选修单元。

The course consists of ten core modules and five optional modules.

《牛津词典》

Now those of you who have taken English 125 or any course that has asked you to read Spenser will recognize almost instantly I think, I hope, Milton's literary depth.

你们中选修英文125或者其他让你们读斯潘塞的课程,的人应该能立刻认识到，弥尔顿的文学功底很深。

耶鲁公开课 - 弥尔顿课程节选

All right,if you decide to take the course, I will see you same place,same time,on Wednesday.

好，如果你决定选修这门课程，周三同一时间，同一地点，我将恭候各位。

耶鲁公开课 - 新约课程节选

So the courses I took - -actually I took some English history obviously - I took no American history which would be the field I did in the PHD, but I took a lot of courses in philosophy, in literature.

所以我选了一些课程,当然我选修了英国历史-,但我没有学美国历史,因为那是我博士时的课程，但我选了很多哲学和文学方面的课程。

普林斯顿公开课 - 人性课程节选