It was the chance of a lifetime.

这是千载难逢的机会。

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If you're looking for the adventure of a lifetime, how about going bungee jumping off a helicopter into the crater of a live volcano?

如果你正在寻找一次一生难忘的冒险经历，那么来一场蹦极，从直升机上跳到活火山口怎么样？

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Trips that many adults would consider the adventure of a lifetime—treks in Borneo, a sports tour to Barbados—appear to have become almost routine at some state schools.

被许多成年人认为是终身冒险的旅行——婆罗洲徒步旅行，巴巴多斯运动之旅——在一些公立学校似乎已经成为家常便饭。

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

VOA: special.2009.01.28

Each of these suffers a sequence of shocks that cumulate over your lifetime, so inequality gets worse and worse as people age.

这些东西随着你的生命,不断经受冲击，所以随着人长大，不平等就越来越严重。

耶鲁公开课 - 金融市场课程节选

And he says, " "I'm going to pack a lifetime of enjoyment into those two minutes."

而他说，“我要把一生中的享乐都打包进这两分钟里“

耶鲁公开课 - 死亡课程节选

"This is the opportunity of a lifetime for me, " he told the club's website.

BBC: SPORT | Rugby Union | Dragons' Cooper joins Gloucester

Instead, they are seeking to reap the rewards of a lifetime of deferred gratification.

FORBES: Savers: Don't Shut Up, Speak Up!

And who knows, it just might turn out to be the opportunity of a lifetime.

NPR: Roth Rewrites History with a 'Plot Against America'