环保是一个庞杂的工程，单靠单次的努力是不够的，需要不断的投入。

The environmental protection is a huge and complicated project. It can not be achieved by a single effort. It needs continuous flow of investment.

youdao

是单次的出行，在从某地去另一地的过程中，你可能需要作不同的行程。

A journey is one single piece of travel. You make journeys when you travel from one place to another.

youdao

我仅有一次引起他们注意的是在我把全A的成绩单拿回家的时候。

The only time I got their attention was when I brought home straight A's on my report.

《柯林斯英汉双解大词典》

So it could be that they think that this is actually-- they haven't understood the experiment and they think this is a multi shot game, not a one shot game, good.

可能是这些人觉得这是,他们没有理解实验的目的,他们认为这是多次博弈而不是单次博弈

耶鲁公开课 - 博弈论课程节选

Another thing we can do, a very important thing, is we can think about changing the game into a game of repeated interaction and seeing how much that helps, and we'll come back and revisit that later in the class.

另一个重要的东西是,我们可以考虑把单次博弈转化成,重复博弈,然后看看是否有效,我们以后再来学习这部分内容

耶鲁公开课 - 博弈论课程节选