大卫·晨佩侬转到了经济学专业，还没有拿到学位。

David Champernowne had switched to economics and had not yet taken his degree.

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然后，从微观和宏观社会学的角度对武汉市晨晚练点老年人参与体育活动进行了一定的分析。

Then, from the micro-and macro-sociological point of view of Wuhan City for morning and evening exercises at the elderly must participate in sports activities carried out analysis.

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