要求学生为每星期一次的研讨班预先准备好材料。
Students are asked to prepare material in advance of each weekly seminar.
我大约每星期一次做腿部运动，而且绝大部分的腿部训练包括芭蕾舞步和瑜伽伸展运动。
I do exercises for legs approximately once a week and most of my leg workouts include ballet movements and yoga stretching.
王教授每星期一下午教我们英语。
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