Therefore, it is significant to study the "rear children" problem.

因此，对农村留守儿童的研究，具有重要的现实意义。

youdao

This is a common problem for millions of children around the world and not just at school, but also at home.

VOA: special.2009.12.21

Piaget was really big into question and answer, but one problem with this is that children aren't very good with language, and this might lead you to underestimate how much they know.

皮亚杰非常热衷用问与答的方法进行研究,但这里存在的一个问题便是,儿童并未能完全掌握语言,这可能会导致你低估他们的理解能力

耶鲁公开课 - 心理学导论课程节选

He says many parts of the world are doing too little to correct the problem of lead poisoning in children.

VOA: special.2009.08.31

Living Maths gives young children fun problem-solving activities like bingo, math shows, that form the basis of learning math when they get older.

FORBES: Cape Town Science Centre Expands Math And Science Learning Hub In South Africa

They included the problem children of every neighborhood as well as students and factory workers.

NPR: Excerpt: 'World War II Writings'

But it is neither a school for problem children nor a tutoring service, she says.

BBC: "Good morning everyone," says the teacher.