Don't keep the children inside all day.

别把孩子们成天关在屋里。

《新英汉大辞典》

Recently, smaller crashtest dummies have also been used to represent children inside crashing cars.

最近，较小的测试假人也投入了使用，以模拟车祸发生时坐在车内的儿童。

youdao

When it grew dark, she turned a suitcase into a bed and put the children inside it, covering them with all the clothes she could find.

天黑下来的时候，她把提箱当作小床，把两个孩子放了进去，又把所有能找到的衣服都盖在了孩子们身上。

youdao

The inside of Ganado High School is busy with children hurrying to classes.

VOA: special.2011.07.01

Inside the suitcase is a plain piece of white paper and the children were asked to draw the things they think they would need on the trip. Sometimes they get they wouldn't need.

行李箱里面是一张普通的白纸,我要求孩子们,在纸上画出他们认为必要的,旅行用品，有时候他们画出来的并不需要。

麻省理工公开课 - 媒体、教育、市场课程节选

The coal miner's wife, Florence Reece, remained inside with her children.

VOA: special.2009.09.07

According to Russian government databases, there are fewer than 20, 000 prospective families for these children inside the country.

WSJ: After Adoption Law, Russia Debates Seizure of Children

Gerald Murphy, who had barricaded himself and three children inside a house in Trenton since Friday, died from a fatal bullet wound.

BBC: Two bodies found after New Jersey hostage stand-off

They sometimes have a dreary image as spaces that keep children inside.

WSJ: If Kids Can Play, Will Mom Shop?