The difference between this last time and all the others is that for once I remembered where half those instincts came from. I remembered Bob.

这类情况时有发生，生死攸关的细微瞬间总有一种蛰伏的本能使我安然脱险，与旁人不同的是，我记得，这些本能来源于鲍勃。

youdao

I hit him once more for luck.

我无故又打了他一下。

《牛津词典》

I need to have it out with her once and for all.

我有必要跟她公开彻底地把话说清楚。

《牛津词典》

Let me tell you about a person I once knew who liked to play card games for money.

VOA: special.2009.10.11

Well, "The wonder is I didn't see at once" and that is the grave that he has made for their child.

奇迹的是我曾经看不见“,是他为他们的孩子准备的坟墓。

耶鲁公开课 - 现代诗歌课程节选

Everytime I've gone to go see a show, except for maybe once or twice,

大概只有一两次例外，每次我去看一场演出时，

实惠的歌舞剧 - SpeakingMax英语口语达人

So for once I put aside my urges and listened to my heart.

FORBES: I Cheated With Amazon.com...And Got Caught

For once I don't mind if I don't walk away with the deal.

BBC: Princess Beatrice's royal wedding hat placed on eBay

For once I would like to be wrong: I hope the stock soars in coming years and am glad to hear the relatively new Board Chairman talk about acquisitions instead of sales to pay off the government.

FORBES: Has AIG Become a Basket Case?