Take at leastone extra class each semester.
每学期至少要报一门选修课
Take at least one extra class each semester.
每学期至少要报一门选修课。
I'm taking extra class this semester.
这个学期我额外选修了一些课程。
Some children feel extra-class continuation is effective.
有些孩子感觉课外补习是有效果的。
Some children feel extra-class continuation is effective.
有些孩子感觉课外补习是有效果的。
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