建筑物一旦建成，或者洗碗机一旦被设计出来并交付生产，项目工作就完成了。

Once a building is built or a dishwasher is designed and turned over to production the work on the project is done.

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一旦安装失寻回系统，在macs系统上和在windows系统上工作一样好的软件被雪藏和悄无声息——一旦有盗贼的数据，就采取行动。

Once installed, the software, which works on Macs as well as Windows machines, is passive and undetectable-and goes into action once a theft has been reported.

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与其他队伍不同，一旦局面吃紧，巴西就变得保守并且他们的意图也容易被洞穿，一旦德国嗅到这种信息，比赛就高下立判了，巴西无路可逃。

Brazil did not have an escape route for when times got rough – unlike other teams in this competition – they were predictable and easy to figure out, and once Germany saw that, the contest was over.

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So it's a really powerful and simple formalism, once we set up what is needed the go through it, right?

因此这是一种很强大而简单的形式,一旦我们定下需要什么,就可以推导出它，对吧？

麻省理工公开课 - 热力学与动力学课程节选

And once you... when you're having that bad of a season, it's really hard to get everyone passionate about it,

所以一旦赛季取得很差的成绩，就很难保持球队的激情，

足球部队长的领导力 - SpeakingMax英语口语达人

But once you start publishing things in between covers, you actually have to decide what goes in and what goes out.

但一旦你开始把书籍加上封面出版，你就必须决定要出版哪些书。

耶鲁公开课 - 新约课程节选