为了让各年龄阶段的学生认识到劳动教育的重要性，中共中央委员会最近发布了相关指导纲要。

In order to stress the importance of hardworking spirit education among students of different ages, the Communist Party of China Central Committee recently released a guideline.

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失眠可能发生在任何年龄阶段。

II.Insomnia can come on at any stage in life.

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不同年龄阶段的儿童对死亡的理解。

Children \ 's Understanding of Death at Different ages.

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So the mathematical notions of infinity or logical notions like logical entailment are beyond a child of this age.

因此,对于无限这个数学概念,或者是,像逻辑蕴涵这样的逻辑概念,超出了该年龄阶段儿童的理解范围

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So claims that--about the failure of conservation in children at different ages could be easily tested and systematically tested, and in fact, there's a lot of support for them.

关于不同年龄阶段的儿童,缺乏守恒概念的论断,能够很轻易的得到系统的检验,事实上,有相当多的证据支持这些论断

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