A generation ago, it was thought that babies born this small could not survive.

在上一代以前，人们认为这么小的新生儿是没法存活的。

《柯林斯英汉双解大词典》

Within a generation, flight has become the method used by many travellers.

在不到一代的时间里，飞行已成为许多旅行者的出行方式。

《柯林斯英汉双解大词典》

She had taken up the cause of a generation of American youth.

她已经开始着手一代美国年轻人的事业。

《柯林斯英汉双解大词典》

But to a new generation of high-speed communicators, a tweet describes a message sent through a popular new service.

VOA: special.2009.02.06

Comes to mind, what happened, even foot-binding, that was something very common practice, basically erased within a generation.

突然想到了缠足这件事，这曾经是很常见的事情，而随着时代的变迁，它也已经淡出历史了。

普林斯顿公开课 - 人性课程节选

Anyway, that shows that I think probability theory does have a long history, but-- it not being an intellectual discipline-- it didn't really inform a generation of finance theory.

不管怎样,这个故事表明概率论,确实有很悠久的历史,但,那时它并非以学科形式存在,也没有对金融理论的产生有过指导意义

耶鲁公开课 - 金融市场课程节选

He added that he had not changed his mind that the vote was a once-in-a-generation opportunity.

BBC: Alex Salmond tells conference 'the nonsense ends' in 2014

He said the project was a "once-in-a-generation chance to transform the whole local fabric of education".

BBC: Gove confirms cuts to school building projects

Doha represents a once-in-a-generation opportunity to help millions in the developing world rise from poverty and despair.

NPR: President Bush's Remarks on the World Agenda