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一一
yī​yī HSK7

one by one

Definitions Defs Origin Strokes Stroke Words Sentences Sents
  • 一一对应 yī​yī​duì​yìng one-to-one
    one-to-one correspondence
  • 一一映射 yī​yī​yìng​shè bijection
    (math.) bijective map