one-off

US /ˈwʌnˌɔf, -ˌɑf/

UK /ˈwʌnˌɔ:f, -ˌɔf/

A1 初級
phr.片語一次性
adj.形容詞一次性的
This was a one-off event, not a regular occurrence.
n.名詞單次
The project was a one-off, not part of a larger strategy.
n.名詞一次性事件
The concert was a one-off, they don't usually perform together.

影片字幕

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05:45囚徒的困境解讀。 (The Prisoner's Dilemma Explained)