Significantly, complaints regarding younger workers have persisted for over two decades, but similar complaints regarding older workers have not grown as the earlier cohorts aged.

值得注意的是，关于年轻工人的投诉已经持续了20多年，但随着早期工人队伍的老龄化，关于老年工人的类似投诉并没有增加。

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For over two decades, Jancke has researched the effects of music lessons, and like Schellenberg, he believes that the only way to truly understand their effects is to run longitudinal studies.

20多年以来，詹克一直在研究音乐课的效果，和舍伦贝格一样，他认为唯一能够真正了解其效果的方法就是进行纵向研究。

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For over two decades, she had been the cleaning lady in a big house.

她曾为同一栋大宅院做清洁工作，有二十多年之久。

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Janet has been reporting on taxes, retirement and personal finance for over two decades for Forbes.

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But computers have littered schools for over two decades without making much impact in the classroom's structure.

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D. in Education, has been an educator for over two decades and currently teaches at a DC-area community college.

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