今后20年是我国地理科学跨世纪发展的奠基期和开拓期。

The coming 20 years is a founding and opening period of geography's trans - century development.

youdao

今后20年是我国地理科学跨世纪发展的奠基期和开拓期。

The coming 20 years is a founding and opening period of geography's trans - century development.

youdao