The purpose of the occasion was to raise money for medical supplies.

此次活动的目的是为医疗用品筹款。

《柯林斯英汉双解大词典》

I accepted and wanted to support them. However, on reflection I believe my attendance could divert attention from the purpose of the occasion which is to focus on the life and service of Diana.

我接受了他们的邀请并希望能支持他们，但经过反复考虑，我想我的出现可能会转移人们对这场活动用意的关注，希望这场活动的焦点仍然是戴安娜的生平和贡献。

youdao

The occasion was a stunt, of course, but had a serious purpose: to show that even the poorest places can mitigate poverty and hunger.

这当然只是噱头，不过也确有目的：向世界展示，即使最穷的国家也能缓解贫困与饥饿。

youdao

Special Abilities Development Association (SADA) organized a one-day multi purpose activity on 3rd December 2012 on the occasion of International Day of Person with Disabilities (PWDs) in collaboration with UNESCO Islamabad at Rest House Timergara Dir Lower.

UNESCO: EDUCATION

This year, the UNESCO Institute for Lifelong Learning (UIL) is marking the occasion with a variety of activities whose main purpose is to promote tolerance, equity and social justice through access to quality basic education and lifelong learning.

UNESCO: CONFINTEA VI

But I think that for the broader purpose of the work that needs to be done in a bipartisan way in Washington, this social occasion is a good thing because establishing -- spending a number of hours together in that kind of environment I think can only help improve the chances of bipartisan cooperation.

WHITEHOUSE: Press Briefing