我写这封信是为了感谢你买了这本书的翻译：I am writing this letter to thank you buy this book 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I write this letter is to thank you for buying this book

I am writing this letter to thank you buy this book

I wrote this letter am in order to thank you to buy this book

I am writing this letter is to thank you to buy the book

I am writing this letter to thank you buy this book