I'm writing this letter to express my gratitude to you for your gracious invitation.

写此信是为了向你表达我的谢意，感谢你的盛情邀请。

youdao

I would like to express my gratitude to everyone for their hard work.

我要对所有辛勤劳动的人表示感谢。

《牛津词典》

I wish to express my gratitude to Kathy Davis for her immense practical help.

我想向凯西•戴维斯表达谢意，因为她给了我许多实际的帮助。

《柯林斯英汉双解大词典》

for its support for German unification. "I wanted to use this opportunity today to express our gratitude, my gratitude to the American people for the support that the American people have given us throughout the process leading to German reunification,".

VOA: standard.2009.11.03

And I want to express my gratitude to all of you -- from government, academia, NGOs and our partners from around the world.

WHITEHOUSE: The White House

I'd like to express my gratitude to President Obama for the confidence he's shown in me with this nomination, and for his unwavering support for a strong and independent Federal Reserve.

WHITEHOUSE: President Obama Nominates Ben Bernanke for Chairman of the Federal Reserve | The White House

But tonight I wanted to come by and express my gratitude to all of you - not only Secretary Clinton and Minister Krishna, but also everybody in attendance, who are actually doing the hard work of advancing the goals that Prime Minister Singh and I set forward in our bilateral meetings.

WHITEHOUSE: U.S.-India Strategic Dialogue