First, the historical research data is collected as the first level data in this model.

首先，搜集某高校历史科研数据作为模型中的第一层次数据。

youdao

First, the historical research data is collected as the first level data in this model.

首先，搜集某高校历史科研数据作为模型中的第一层次数据。

youdao