当时在龙港三小，每周上一次电影课，时间安排在每周五的下午，每次上课都先看一部电影。
In Long Gang Primary School, children saw a film on Friday afternoon each week. They had a simple discussion after it.
我每周上一次小提琴课。
一组每周在电脑控制的平台上进行一次平衡练习，一组每周上一次太极课，而另一受控组则每周进行一次讨论。
One group performed balance exercises on a computer-controlled platform once a week, one group took a weekly tai chi class, and a control group met for a weekly discussion.
汉语言文学专题讲座：这门课每周上一次，每节课由一个教授介绍自己最近的研究成果，或者请一个作家来介绍自己的作品。
There is one class once a week. In each class, a professor introduces his recent research results. Or a writer introduces his or her own works.
汉语言文学专题讲座：这门课每周上一次，每节课由一个教授介绍自己最近的研究成果，或者请一个作家来介绍自己的作品。
There is one class once a week. In each class, a professor introduces his recent research results. Or a writer introduces his or her own works.
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