This competition, to me, is a chance of lifetime.

对于我来说，这次比赛是个千载难逢的机会。

youdao

It was the chance of a lifetime.

这是千载难逢的机会。

youdao

And since it takes them the whole of their lifetime and all their resources to find out this weakness of theirs, they never get the chance of profiting by experience.

而且，既然他们要花费一生的时间和所有的财力，才能明白自己的这个弱点，因此，他们决无机会从经验教训中获益。

youdao

For him, coming to America to attend George Washington University was the chance of a lifetime.

VOA: special.2009.01.28

Bradley, with 28 wins and no losses (one no contest), gets his chance of a lifetime against Manny Pacquiao, whom we're pretty sure you have heard of.

CNN: STORY HIGHLIGHTS

The organisers are billing it as "a chance of a lifetime" to perform in the Millennium Dome's central attraction to audiences of up to 12, 000 a show, six times a day.

BBC: News | Entertainment | It could be you at the Millennium show

They expressed gratitude for the chance of a lifetime to experience another country and culture.

ECONOMIST: Responsible NATO