Chinese

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one; single; a
one; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)
 
up; on; on top
up; on; on top; upon; first; previous or last; upper; higher; above; previous; to climb; to go into; to go up
 
simp. and trad.
(一上)

Pronunciation

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Adverb

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一上

  1. (literary) all of a sudden; all at once