And only over the past 30 years have scholars examined history from the bottom up.

而学者们开始从下至上地研究历史还是近30年的事情。

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And only over the past 30 years have scholars examined history from the bottom up.

仅仅在过去的30多年间，学者们就已经从上至下地审视了历史。

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And only over the past 30 years have scholars examined history from the bottom up.

仅仅在过去的30多年间，学者们就已经从上至下地审视了历史。

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