for a good cause

基本解释

This could be a struggle against adversity, selfless work for a good cause, or something really funny or unique.
这可以是一场和逆境的抗争、为一个好理由做出的无私奉献、或是真正有趣或特别的事。
When confronted with these exaggerations, some of us say that they are for a good cause, and surely there is no harm done if the result is that we focus even more on tackling climate change.
有些人看到这些夸大的描述后，认为它们都是出于好意。当然，这些灾难性描述带来的反应，如果只是人们变得更加关注如何应对气候变化，那自然没有什么坏处。
The company allows people to buy boxes of doughnuts at cost price, and then sell them for a profit for a good cause, and many of these are schools or children's groups such as Scouts and Guides.
该公司允许人们以成本价购买盒装的甜甜圈，然后用一个好的名头卖掉它们从而获取利润，大多是通过学校或学生团体，比如说女童子军和导师。

But at the same time, it is for a good cause.
because you know that they'll use it for a good cause.
因为你知道他们会妥善地使用这笔钱。
不做善事的理由 - SpeakingMax英语口语达人
Parties... I mean they're pretty good. Sometimes they're for a cause,
派对……它们挺好的。有时候是为了慈善，
派对很好玩 - SpeakingMax英语口语达人

Sometimes it's done for a good cause--Amanda Peet asking parents to inoculate their children.
FORBES: Stars Vs. Science