From Ancient Greek δίς (dís, “double”) + γράφω (gráphō, “write”), equivalent to di- + -graph.
释义（英文）
名词Noun
(linguistics) A pair of letters, especially a pair representing a single phoneme (such as ae, oe, or Sz). (Such a pair is sometimes represented or encoded with a ligature, such as æ, œ, or ß.)
(computing) A two-character sequence used to enter a single conceptual character.
(divination of the Taixuanjing) a sequence of two lines, each of which may be unbroken, broken once, or broken twice.