0 A once-in-a-lifetime experience or opportunity is very special because you will probably only have it once. -- 一生中难得一次的；千载难逢的；难能可贵的
A tour of Australia is a once-in-a-lifetime experience. 澳大利亚之行是一生难得的一次经历。
Initially, it thought that it was a once-in-a-lifetime problem that, having been dealt with once, would not have to be revisited.
This effort proved to be very popular among the full-house crowd in attendance, as well as the players who experienced this once-in-a-lifetime opportunity.
In many areas the offer of unfurnished accommodation is a once-in-a-lifetime opportunity because of the acute shortage of such housing.
The consumer is involved in legal activity as a once-in-a-lifetime experience.
Many of their clients are small, once-in-a-lifetime clients.
For so many of our children, the once-in-a-lifetime opportunity of learning the foundation for a successful, prosperous and independent life is negligently and needlessly blotted out.
The story had been a once-in-a-lifetime opportunity and it was heartbreaking to see such wonderful material wasted.
Let me repeat, this is a once-in-a-lifetime opportunity.
