The administration has not really thought through what it plans to do once the fighting stops.

政府还没有真正充分考虑一旦战争结束它打算做什么。

《柯林斯英汉双解大词典》

If she once decides to do something, you won't change her mind.

她一旦决定干什么，谁也改变不了她的主意。

《牛津词典》

So, once we have cohabited, why do many of us feel the need to get married?

那么，一旦我们同居了，为何我们中的许多人就觉得有必要结婚呢？

《柯林斯英汉双解大词典》

"Perhaps with education once you learn you can do one item, it empowers you to do the next.

VOA: special.2010.12.27

You can kind of see where the syntax is going, looks like a loop, but you can kind of put blocks inside of you, and the little arrow suggests that once you get to the bottom just like our socks example, you're gonna do the following again.

从某种程度上你可以看到它的语法构成,像个循环，你也可以把，一些程序块放到循环中，如同短袜的例子，这个小箭头暗示你一旦到达底部,你将会重复接下来的事情。

哈佛公开课 - 计算机科学课程节选

How could I possibly do it in sublinear time, I've got to look at least every element once.

我每个元素都至少得看一次，这就是我希望你们能够考虑的本质。

麻省理工公开课 - 计算机科学及编程导论课程节选

But, until then, they want the government to proceed as it once agreed to do: allow the cut at the stipulated level, and stop stalling every time the environmentalists ask it to.

ECONOMIST: The logging industry

Michigan State star Draymond Green said he once had to do push-ups as punishment for wearing Michigan-style black socks.

WSJ: NCAA Tournament: It's All About the Socks

Indeed, Mr Kim has promised, more than once, to do just that.

ECONOMIST: North Korea's nuclear spectacular