英文版感谢信

First of all, Id like to express my sincere gratitude to my academic supervisor,Professor Rao Zhenhui, for his valuable advice, guidance and constructive comments throughout the development of this thesis and for making available to me the relevant books and materials. His religious devotion to study and research has greatly impressed me and will definitely have a permanent effect on my future life and study.

I would like to take this opportunity to express heartfelt gratitude to all the teachers who have taught me and helped me during the years of my study in Jiangxi Normal University. They are Prof. Li Yongzhong, Prof. Mu S