一个难以理解的英语4级句子～elective courses are available not only for excellent academic performers but also for students about the average level.这句话怎么理解?为什么用about the average level.about在这里是什么意思?
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/08 14:20:45
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