once-in-a-lifetime

listen to the pronunciation of once-in-a-lifetime
Английский Язык - Турецкий язык
hayatta bir kere
kırk yılda bir
Английский Язык - Английский Язык
That is likely to happen only once in one's lifetime

a once-in-a-lifetime opportunity to travel the world.

extremely rare, will never happen again
once-in-a-lifetime
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