I didn't do it for reward; I did it for love.

我做这件事不是为了报酬；我做这件事是出于爱。

youdao

I did it for his benefit.

我做这个是为了帮助他。

youdao

I did it for you.

我为你做了这些。

youdao

I once landed on my face. I soon learned that it took much less effort for me to move on Mars than it did on Earth.

VOA: special.2010.07.10

And the idea, again, is the kids who don't get rewarded say to themselves, "Well, I just spent time doing it, it must have an intrinsic value," while the children who get rewarded say, "I did it for the sticker. I did it for the toy.

再一次，没有得到奖励的孩子心里想，“我花了时间来做这件事，它一定是有内在的价值的”,而拿到奖励的小孩会说，“我是为了贴纸和玩具才做的”

耶鲁公开课 - 心理学导论课程节选

You might have predicted it the other way around, the twenty dollars, "wow, well, twenty dollars, I must have enjoyed it because I got twenty dollars," but in fact, the logic here is the people with twenty dollars when asked, "What do you think of the task?" could say, "It was boring. I did it for twenty dollars."

你们猜想的结果可能跟这个相反，拿20美元的那组，”20美元，我当然很喜欢这个任务“,”因为我拿到20美元“,但事实是，当问及20美元那一组时，”你喜欢这个任务吗/“,”很无聊，我为了20美元才做的“

耶鲁公开课 - 心理学导论课程节选

"I did it for me, " Robinson said of losing the weight.

CNN: iReporter shakes off 170 pounds

But I did it for my own pleasure, my own pride.

CNN: McCain: Change is coming

The first time, I did it just for fun.

FORBES: Turning Rejection Into A Business Of Love