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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The Education Department of China has announced that schools should ban students from carrying mobile phones during school hours.

中国教育部宣布，学校应该禁止学生在上课时间携带手机。

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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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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.

BBC: Call for more Jerriais speakers in Jersey

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

BBC: Learning to surf in the land of giants

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

WSJ: Even in pro-gun states, bid to arm teachers stalls