不要在教室里面吃东西，你可以在外面或餐厅里面吃东西。
Don't eat in the classroom. But you can eat outside or in the dining halls.
班长叫同学们在应当复习功课的时候不要在教室里胡闹。
The monitor told his classmates not to fool about in the classroom while they should be reviewing their lessons.
班长叫同学们在应当复习功课的时候不要在教室里胡闹。
The monitor told his classmates not to fool about in the classroom while they should be reviewing their lessons.
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