optional course和elective course有什么区别?

optional course和elective course有什么区别? specialized course,restricted optional course ,general optional course.3761 那个optional course和elective course相比哪个的自由度差点? elective course是什么意思?与optional course的用法差异 OPTIONAL optional optional you took an optional course this semester.请翻译一下, i have to go for the optional course 选修课的英文是optional course还是elective course并说明为什么 21402—the courses at university are divided into specialized course,restricted optional cours214021402—the courses at university are divided into specialized course,restricted optional course ,general optional course.3761 想问：1—are divided selective course和optional course有什么区别?貌似这两个一个是必须从一堆里选几个的选修课,一个是可以选可以不选的选修课.有这么回事吗? 帮我看看我的文章吧有什么毛病请指出 An optional course on English Time goes by,I have studied this optional course for a term.I like English ,That’s why I choose English for my optional course.When I first came into this classroom,I OPTIONAL TAGLINE optional是什么意思? OPTIONAL是什么意思? optional extras optional是什么意思