compulsory course 必修课optional course 选修课
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选修...课程的英文：take classes in
Elective Paper(s) ---Most populor use in New Zealand, Paper has another meaning for course or subject
选修课：anelectivecourse;aselectivecourse;aselectedcourse必修课：arequiredcourse;anobligatorycourse
elective course
"Elective course"例句全部selective courseoptional course选修课包括太极拳和高级舞蹈练习。Electives are offered in Tai Chi and advanced dance exercise.
optional course 是对的~~~cet4听力~~出现n次了~~
optional course/elective course/selective course都可以
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川猫之介
