采用科学史观简要分析了黄土高原生态环境演变的历史过程。

The process of eco-environment change was analyzed article with scientific view of history.

youdao

采用科学史观简要分析了黄土高原生态环境演变的历史过程。

The process of eco-environment change was analyzed article with scientific view of history.

youdao