researched periods翻译

researched periods的基本解释

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研究周期：指进行研究的一段时间。

例句

Tirole has researched periods when markets failed, that is, when they did not provide good results in price and competition.市场失效是指市场在价格和竞争上未能提供好成绩。
By dividing the environmental protection process into three periods, this thesis mainly researched the environmental regulation structure and its dynamical mechanism to change in certain period.本文通过对迄今我国环境管制结构三个时期的划分，主要研究了特定时期我国的环境管制结构及其变迁的动力机制。
The impacts of different farming way on arthropod community were researched in different growing periods.本文研究了不同耕作方式对稻田节肢动物群落在各生育期数量变化的影响。
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