During school time, students are not allowed to leave school without permission.

在学校时间内，各学生不准擅自离校外出。

youdao

It is natural for teenagers, especially boys , to feel hungry a lot during school time.

对于青少年来说，尤其是男生，在上学的期间感觉到饥饿是很正常的。

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Most averaged just over nine hours during school time. But a significant proportion got less than eight hours a night.

在上学期间，大多数儿童的平均睡眠时间刚刚超过9个小时，不过还有数量可观的儿童一天睡不到8个小时。

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She says the government has provided books for her school only one time during the past few years.

VOA: special.2009.08.24

Taking children out of school during term time is very much frowned upon.

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On average, school pupils in Wales will have had eight hours of cookery lessons during their time at school.

BBC: Food critic's call to boost school cookery lessons

Ms. REEVES: I remember one time we had a talent show in junior high school, which is during the time that I decided I wanted to sing, and there were a lot of things going on in school at that time 'cause we were the first students to be bused in Denver, Colorado.

NPR: Taking On the Billie Holiday Catalog