年龄上的周期变化往往还带来研究和教学上的周期性变化，所以讲座也存在“学术周期”（Academic Cycle）问题。这表现在研究方面尤甚：随着教授、助教授的年龄增加和人员更替，学术的形式和学术生产性也不可避免地发生周期性变化。
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academic cycle
学术周期
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The Chief Inspector of Schools, Chris Woodhead, said that schools which performed much better than those with similar levels of disadvantage were examples of how schools could intervene in the cycle of poverty and academic failure.
BBC: 'Culture of hard work' overcomes poverty
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