On the basis of vector analysis, fundamental concepts of electromagnetic fields are introduced starting from the experimental laws of...

本书从历史和哲学的角度，深入浅出的向读者讲述了塔里木河流域环境由坏变好的故事。文章表达流畅，感情真挚，作者就是土生土长的塔里木人，亲眼见证了塔里木河的断流、胡杨林的枯萎，到现在胡杨林生长旺盛、塔里木河又重新生机勃勃。作者用自己的亲身感受向读者讲述着这个爱与恨的故事。

Level Elementary Altogether there are three volumes, each of which is divided into two volumes. The first two are used in the first semester, the...

This book is a primary grammar textbook for foreigners who are learning Chinese. It can be used as a reference book for teaching and research by...

Glimpses of Chinese Culture tells 200 stories of historical figures covering 25 subjects such as history, philosophy, religion, politics, economics,...