on behalf of

代表整个公司，我想感谢您所做的所有工作。

___On ___behalf ___of the entire company, I would like to thank you for all your work.

我代表我们大学英语俱乐部的成员写信欢迎您来到我们的城市。

I am writing ___on ___behalf ___of our college English club members to welcome you to our city.

我代表学校开展一个关于全球变暖的项目。

I am doing a project ___on ___behalf ___of my school about global warming.