See also: 一叶知秋

Chinese

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one; single; a
one; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)
 
leaf; page to know; to be aware
autumn; fall; harvest time
autumn; fall; harvest time; a swing
 
trad. (一葉知秋)
simp. (一叶知秋)
Literally: “the falling of one leaf heralds autumn”.

Pronunciation

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Idiom

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一葉知秋

  1. a small sign can indicate a great trend