本文介绍了长波理论的创始人范·盖尔德伦的理论观点。

This article introduces theories and ideas of Van Geldren, the person who initiated the long-wave theory.

youdao

本文介绍了长波理论的创始人范·盖尔德伦的理论观点。

This article introduces theories and ideas of Van Geldren, the person who initiated the long-wave theory.

youdao