There's a lot of science that shows it's important to have kids play, to have unstructured playtime, and that every moment doesn't have to be spent in productive activity.

大量的科学研究表明，游戏对孩子是非常重要的，让他们拥有自由的游戏时间，并不要求每一分钟都花在高效率的活动上。

youdao

Problem solving is not only a productive activity process, but also an advanced learning process.

问题解决既是一项创造性的实践活动，又是一个高级的学习过程。

youdao

Marx's concept of practice consists of two aspects. that is, productive activity and communication activity.

马克思的实践概念包含着两个向度：人征服自然的生产活动以及人与人之间的交往活动。

youdao

is the concept of man as a heroic being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute."

VOA: special.2010.06.06

Most productive activity was small enterprise, often family conducted and sometimes with a few other workers.

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The West needs to focus on direct productive activity and focus on it hard.

FORBES: Listen Up Bernanke, QE Is Not The Answer

Incentives are consequently slashed for productive activity, such as savings, investment, work, business expansion, business creation, job creation, and entrepreneurship.

FORBES: Reaganomics Vs. Obamanomics: Fallacies Offered By The Left