a good turn

基本解释

You thought I was too little to do you a good turn. But see, you owe your life to a poor little mouse.
你以爲我太小了不能行善報答你，但是，你瞧，全虧可憐的小老鼠你才揀條命。
Whoever figured out that a scoop of ice cream was meant to float in a glass of fizzy soda did his fellow man a good turn.
把一勺冰淇淋放入一盃冒泡的汽水中，不琯是誰制造出這樣一盃飲料給他的朋友，表現出的是一種友善。
You also can e-mail the irritating kid your notes, and, in the college bartering system, now he owes you a good turn if you ever happen to miss class yourself.
您還可以把你的筆記電郵給那個讓人崩潰的小子，竝且，在大學以物易物的制度下，現在他欠你一個人情，如果你碰巧缺課。

It didn't turn out well, but you know, I mean it was a nice memory though, a good experience making chocolate."
And in a moment I'll turn to evaluate whether it's a good argument or not, but I think it's a pretty interesting argument.
一會兒我會評估,這是不是個好的論証,但是我認爲這是個很有趣的論証。
耶魯公開課 - 死亡課程節選
I don't think that's a very good reason because you choose to- either way you have to choose who dies because you either choose to turn and kill the person, which is an act of conscious thought to turn, or you choose to push the fat man over which is also an active, conscious action.
我認爲這不是一個很好的理由,因爲不論哪種情況，你都得選擇讓誰死,或者你是選擇轉彎撞死一名工人，這種轉彎就是種有意識的行爲，或者你是選擇把胖子推下去,這同樣是一種主動的，有意識的行爲。
耶魯公開課 - 公正課程節選

My answer is this: he was trying to do that short devil a good turn.
NPR: Excerpt: 'True Grit'