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Andrew McKenzie, director of Old Masters at Bonhams, called the discovery "a once in a lifetime experience and it is tremendously exciting to be able to bring it to the world's attention".

宝龙拍卖行“欧洲古代大师”部门主管安德鲁·麦肯锡（Andrew McKenzie）称这一发现为“一生仅有一次的经历，能将它带到全世界的关注之下极其令人兴奋”。

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It was just a ridiculous, once-in-a-lifetime experience.

那简直太不可思议了，一辈子只有一次的看球体验！

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I'm going to do this thing. So,that's why I got here." Robert Nephalama,who works at a bank near Johannesburg, wants to make the tournament a once-in-a-lifetime experience for the visitors as well.

VOA: standard.2010.03.26

Now, if you ask me right now if I would rather experience intense pleasure or have a full lifetime of higher pleasure, I would consider intense pleasure to be low pleasure.

现在你要是问，我是要体验强烈的快感,还是一辈子的高级快乐，我把强烈快感看作低级快乐。

耶鲁公开课 - 公正课程节选

The World Health Organization says one in three women around the world will experience some form of violence in their lifetime.

VOA: special.2009.10.24

Both called it a "once in a lifetime experience" for the fans planning to come.

WSJ: Going to the Bronx��Not the Beach

The Derby is a once-in-a-lifetime experience for some, because the expenses can add up quickly.

CNN: Crowning glory: The art of Kentucky Derby hats

If you are not, it hardly rates as a once in a lifetime experience.

FORBES: 10 Best Once In A Lifetime Trips: Best Of 2013 Bucket List Travel