Can't you be nice to each other just this once?

难道你们就不能彼此客气哪怕一次？

《牛津词典》

Oh, please, Dad, just this once don't be cheap.

哦，求求你，爸爸，就这一次，别小气嘛。

《柯林斯英汉双解大词典》

M: Well, just this once, come on!

玛：好的，就这一次，来吧！

youdao

The agreement,once it takes effect, will be the first under international law to target just this problem.

VOA: special.2009.12.08

When I started merging, I did merging three times across this whole board, this level, this level, and this level, and each time because of the way I was advancing my fingers I touched each number just once.

在整个过程中，我一共做了,三次合并，这一层，这一层，和这一层，而且每次,由于要前移手指，因此对每个数字,仅仅移动了一次。

哈佛公开课 - 计算机科学课程节选

Alright, so maybe a little underwhelming and we saw already what this program is going to do but let's just go through this process once before we start doing more interesting things and then we'll come back and at least give you a hint of what some of these syntactic details are doing.

好吧，这个程序也许太平庸了，让人印象不够深刻,我们也知道这个程序是干嘛的,在我们开始更有意思的事情之前,让我们再来讨论一下整个过程后再回来,这些语法细节到底是在做什么呢？,先给你们一点小小的提示。

哈佛公开课 - 计算机科学课程节选

Earlier this year Lula said farmers could sell, just this once, the soya they had harvested.

ECONOMIST: GM crops in Brazil

For herself, she ordered a dispiriting salad and a Coke a real Coke just this once, not Diet.

NPR: In 'Challenger Park,' Mom Is an Astronaut

If you will, just this once, read the actual CBO report, it will be an eye opening experience.

FORBES: Anti-Obamacare Forces Introduce Their Latest Effort To Mislead The Public