在日常生活中，书信是一种非常重要的交流方式。无论是正式场合还是私人沟通，一封得体的书信都能传递出清晰的信息和真挚的情感。下面是一封关于感谢的英文书信，附有中文翻译，供你参考。

Dear Mr. Johnson,

I am writing to express my heartfelt gratitude for your invaluable support during my recent project. Your expertise and guidance were instrumental in helping me achieve success. I truly appreciate the time and effort you invested in assisting me.

Your encouragement has been a great source of motivation, and I feel incredibly fortunate to have had the opportunity to work with someone as knowledgeable and supportive as you. Thank you once again for your kindness and dedication.

Sincerely,

[Your Name]

亲爱的约翰逊先生，

我写这封信是为了表达我对您在我最近的项目中给予我的宝贵支持的由衷感激之情。您的专业知识和指导对我取得成功起到了关键作用。我非常感谢您投入的时间和精力来帮助我。

您的鼓励是我极大的动力来源，能有机会与您这样知识渊博且支持我的人合作，我感到无比幸运。再次感谢您的善意和奉献精神。

此致，

[你的名字]

通过这样的书信，不仅能够传达个人情感，还能加强人际关系。希望这个例子对你有所帮助！