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once(a)

adv.

on one occasion
"once I ran into her"

同义词： one time in one case
as soon as
"once we are home, we can rest"
at a previous time
"she was a dancer once"

同义词： formerly at one time erstwhile erst

adv.

on one occasion

"once I ran into her"

同义词：one timein one case

as soon as

"once we are home, we can rest"

at a previous time

"she was a dancer once"

同义词：formerlyat one timeerstwhileerst

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