Conclusions: The obvious impaired executive functions are found in children with ADHD, involving poor response inhibition, impaired working memory, dysfunction of planning and set-shifting.

结论：ADHD儿童存在反应抑制、语音工作记忆、视空间工作记忆、计划能力和定势转移能力等多项执行功能的缺陷。

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We are therefore not talking about adapting to a new standard, but to a constantly shifting set of conditions.

因此，我们不是在谈论适应一个新标准，而是在谈论适应不断变化的情况。

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But the industry is working overtly and behind the scenes to fend off these attacks, using a shifting set of tactics that have defeated similar efforts for 30 years, records and interviews show.

但是记录和访谈表明，该行业在台前幕后做工作以挡开这些攻击，用一套击败了相似努力已30年的转移战术。

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For the last few years, youth in the U.S. have been barraged with bad news: An unemployment rate that reached 18.1% for the 16-to-24 set in 2011, rising education costs, shifting market demands and declining middle-class jobs.

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