What can be more effective are techniques that psychologists often use with the most difficult kids, including children with attention deficit hyperactivity disorder and oppositional defiant disorder.

心理学家常对最棘手的孩子(包括有注意缺陷多动障碍和对立违抗性障碍的孩子)使用的技巧是比较有效的。

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All these activities can prevent the growth of important communication and thinking skills and make it difficult for kids to develop the kind of sustained concentration they will need for most jobs.

所有这些活动都会阻碍重要的沟通和思考技能的发展，使孩子们很难培养出大多数工作所需要的那种持续的专注力。

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Kids learn how to build their emotional and social skills through difficult situations.

孩子们能学习如何在困难的情况下建立他们的情感和社交技能。

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So when you talk to class four, he says,then it is difficult to teach the little kids in class one.

VOA: standard.2010.02.25

It is very difficult to find any effect of how parents talk to their kids on how their kids learn language, particularly when it comes to babies.

家长跟儿童的说话方式,并未对儿童如何学习语言,产生任何影响,尤其是在对待婴儿的时候

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