上课不许吃零食用英文怎么说

"No snacks allowed during class" 是说禁止在上课时吃零食的意思。

这句话来源于英语中"no" 和 "allowed" 的结合，"no" 意思是"不"，"allowed" 意思是"允许"。 "during class" 是说在上课时间。

例句:

"Please refrain from eating snacks during class." (请在上课时不要吃零食)
"Students are not allowed to bring snacks to class." (学生不能带零食上课)
"Eating during class is prohibited." (上课时禁止吃东西)