必修课和选修课的英语怎么说?

必修课和选修课的英语怎么说?

必修课 [简明汉英词典]
a required course选修课 [简明汉英词典]
elective course

选修课：elective course
必修课：required course

必修课
a required course
选修课
take as an elective course