An expert said mobile phone use was a distraction to students during school hours.

一位专家表示，在上课时间使用手机会分散学生的注意力。

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Children in Britain can work two hours a day at the most on a school day but not during school hours.

在英国的上学日，除去上课时间，孩子们最多可以每天工作两小时。

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The mobile phone was a distraction to students during school hours and it also brought teachers so much trouble in class before.

手机会使学生在学校里分心，它也给老师上课带来了很多麻烦。

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Benny worked at the Barrison Theater sometimes during school hours.

VOA: special.2009.10.11

Year four pupils take six lessons in the language during school hours as part of the citizenship curriculum.

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This wave is almost exclusively popular with kids, so if you visit during school hours you will probably have it to yourself.

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Indiana Gov. Mike Pence raised concerns this past week about a bill requiring an armed "school protection officer" onsite during school hours.

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