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optional course [英] [ˈɔpʃənl kɔ:(r)s] [美] [ˈɑpʃənəl kɔ:(r)s] [短语] 选修课 词频排名 51923/55435 学习人数 78 难度等级 5/10 认知比例 68.97% 例句 You can take English Conversation as an optional course . 你可以选修英语对话课。 Sometimes I don't want to attend my optional course. 有时候我不想去上选修课。 助记 联想 required/compulsory course必修课 elective/optional course选修课 minor course辅修课
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