一旦有了定期的飞机航班，乘坐远洋客轮出差就变得不切实际了。

Once there were regularly scheduled airlines, it became impractical to make a business trip by ocean liner.

《柯林斯英汉双解大词典》

一旦有了更多的信息我就会与你联系。

I'll be in contact with you once I have some more information.

youdao

youdao

Turns out that once you get past the hormonal blast of adolescence about 10% of dreams have explicit sexual content.

研究还发现一旦你过了,荷尔蒙旺盛的青春期,你有10%的梦都是和性有关的。

耶鲁公开课 - 心理学导论课程节选

PROFESSOR: So, does anyone have any questions about the set up here, does it make sense what we're looking for the bar to go back once we make some progress.

教授：所以，有人对这套装置,有疑问吗，一旦我们,取得了一些进展,我们看到这个棒又返回来。

麻省理工公开课 - 化学原理课程节选

If you make Jell-o and you make it right, then once it's set or gelled, it has mechanical properties.

如果你用正确方法做出了吉露果冻,它一旦凉下来定了型,就有了机械性能

耶鲁公开课 - 生物医学工程探索课程节选