英语学习乐园：课程
时间：2016-12-28 06:14:26
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（单词翻译）
Can you explain the difference between the two phraces?
My favorite subject is history.
Proffesor Zhang's
lecture1 is too difficult,I could hardly keep up with it.
We have 8 courses this semester,including the ——.
required course必修课
elective选修课
subject科目
course课程
extracurricular课外的
keep up with跟上
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