求翻译：Chapin et al. described an expanded classiﬁcation scheme of 12 categories based on how artifacts and activities were observed to have changed是什么意思？

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Chapin et al. described an expanded classiﬁcation scheme of 12 categories based on how artifacts and activities were observed to have changed

问题补充：

匿名	2013-05-23 12:21:38 翠萍等人。描述扩大的基础上如何观察到的文物和活动已经改变了12个类别的分类方案

匿名	2013-05-23 12:23:18 正在翻译，请等待...

匿名	2013-05-23 12:24:58 Chapin等。描述了根据怎样的12个类别一份膨胀的classiﬁ正离子计划人工制品和活动被观察改变了

匿名	2013-05-23 12:26:38 Et al.才描述已更改基于工件和活动被观察到的 12 类扩展的 classiﬁcation 计划

匿名	2013-05-23 12:28:18 google学术

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