盟军部队明天开始演习，来展示一旦发生新的入侵，军队能以多快的速度集结起来。

Allied troops begin manoeuvres tomorrow to show how quickly forces could be mobilized in case of a new invasion.

《柯林斯英汉双解大词典》

一旦发生这种情况，我就不断延后一天中的学习时间。

Once that happened, I just kept pushing my studying further and further back in my day.

youdao

一旦发生这种情况，你就很难恢复听力。

Once this happens, it's hard to get your hearing back.

youdao

She explains to Comus what would happen should she actually choose to break her silence, should she actually choose to unleash all of the rhetorical powers that she has pent up inside of her.

她向科玛斯解释,一旦她打破沉默将会发生些什么，一旦她真正选择揭开那些,禁锢在她内心许久的浮夸的力量。

耶鲁公开课 - 弥尔顿课程节选

Once the gases are mixed, there's not going to be any further net change in the system.

一旦气体混合,这个系统就不会发生任何净的变化。

麻省理工公开课 - 热力学与动力学课程节选

> Once we changes phases, realize that a whole lot more was happening on the next screen.

>一旦我们有所改变，下一秒就会发生许多,翻天覆地的变化。

哈佛公开课 - 计算机科学课程节选