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关注：1
2013-05-23 12:21
求翻译：Despite a continuing record of interest over the years, few studies have documented the demographics of grade retention or the relationship between it and academic achievement across multiple grades and groups of students.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
Despite a continuing record of interest over the years, few studies have documented the demographics of grade retention or the relationship between it and academic achievement across multiple grades and groups of students.
问题补充： |
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2013-05-23 12:21:38
正在翻译，请等待...
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2013-05-23 12:23:18
尽管一个继续的纪录利益多年来，少量研究提供了等级保留人口统计学或它和学术成就横跨多个成绩和小组的关系学生之间。
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2013-05-23 12:24:58
尽管一个继续的纪录利益多年来，少量研究提供了等级保留人口统计学或它和学术成就横跨多个成绩和小组的关系学生之间。
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2013-05-23 12:26:38
尽管多年来感兴趣的继续记录，几项研究记录了年级保留的人口统计数据或它与学业成绩之间的关系，跨多个职系和学生群体。
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2013-05-23 12:28:18
正在翻译，请等待...
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