不准在教室吃东西，表禁止。

Don't eat in the classroom.

youdao

不准在教室里吃东西，务必在餐厅里吃东西。

Don't eat in the classroom. You must in the dining hall.

youdao

不准在教室里吃东西，务必在餐厅里吃东西。

Don't eat in the classroom. You must in the dining hall.

youdao