"I thought that sooner or later one thing was sure to happen: The first real test once he was through school would ruin him.

VOA: special.2009.01.03

Once again the row player is the first payoff and the column player is the other payoff.

这次还是第一个收益是我的,另一个收益是我对手的

耶鲁公开课 - 博弈论课程节选

And they completely change once your first paper is due or the midterms arrive.

要写第一篇论文，时，情况彻底改变,或期中考试来临时。

哈佛公开课 - 幸福课课程节选

I thought that sooner or later one thing was sure to happen: The first real test once he was through school would ruin him.

VOA: special.2010.03.27

So let's imagine we're playing the game again, once again you're going to the movies, once again the first one didn't happen so you didn't for some reason it was cancelled that night because someone had a bad cold or something.

我们再来进行一次这个博弈,假设你们又要一起去看电影,由于种种原因,第一天晚上你们都没有看成,假装因为有一个人感冒了

耶鲁公开课 - 博弈论课程节选

But first,the family stopped once more in Paris.

VOA: special.2009.07.12