once-in-a-lifetime
adjective[before noun]
uk/ˌwʌn.sɪnəˈlaɪf.taɪm/us/ˌwʌn.sɪnəˈlaɪf.taɪm/A once-in-a-lifetimeexperienceoropportunityis veryspecialbecause you willprobablyonly have itonce:
一生中难得一次的;千载难逢的;难能可贵的AtourofAustraliais a once-in-a-lifetimeexperience.澳大利亚之行是一生难得的一次经历。
Unique and unusual
- accidental
- alt-
- alternative
- be marked out assomethingidiom
- be one of a kindidiom
- guerrilla
- incongruous
- inimitable
- irreplaceable
- larger than lifeidiom
- quaintly
- quaintness
- quirkiness
- quirky
- random
- uniquely
- unmatchable
- unmatched
- unparalleled
- unrivalled
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Rarely & infrequently