开头：1) I am writing to convey my gratitude to you 我写信是为了表达对你的感激之情。2) I would like to take the opportunity to express my appreciation for your timely help and 我想利用这个机会，因为你的及时帮助和协助表达我的感激之情。3) Many thanks for all the things you have done in helping us 非常感谢你为帮助我们所做的一切。4) Words fail to convey my gratitude to 我对你的感激之情难以言表。5) My true gratitude is beyond any words/任何语言都不能表达我真挚的谢意。结尾 ：1) I must thank you again for your generous 我必须再次因为你的慷慨相助而感谢你。2) From what you did I learn that helping others is a traditional virtue， so I’ll keep it 从你所做的事情中我学到帮助别人是一种美德，所以我也会将它传承下去。3) Please accept my heartfelt appreciation again， I’m eagerly expecting our next 请再次接受我由衷的感谢，期待我们下次见面。4) I am so proud of having such a generous friend as you， and I will always be there as long as you 很骄傲拥有你这样慷慨的朋友，只要你需要我也会一直在。5) I wish there were a better word than “thanks” to express my appreciation for your generous 我希望能有比“谢谢”更好的词来表达我对你的感激之情。
Acknowledge First and foremost， I appreciate my college which gives me a comfortable learning Second， I would like to show my deepest gratitude to my supervisor， Miss Zhang， who has walked me through all the stages of the writing of this Without her illuminating instruction and patience， this thesis could not have reached its present I am also greatly indebted to all my teachers who have helped me to develop the fundamental and essential academic My sincere appreciation also goes to all my classmates， who are my proud of my Last but not least， I want to thank all my friends， especially my three lovely roommates， for their encouragement and
“致谢”一般在论文的最后：Acknowledgement:例如：We are grateful to Dr Li who made NMR analysis for the most of new compounds， and to Miss Li who typed the We also greatly appreciate P Li’s useful
