doppelgangeryoudaoicibaDictYouDict[doppelganger 词源字典]
doppelganger: [19] English borrowed doppelganger from German doppelgänger, which means literally ‘double-goer’. It was originally used in the sense ‘ghostly apparition of a living person, especially one that haunts its real counterpart’ (‘hell-hounds, doppel-gangers, boggleboes’, M A Denham, Denham tracts 1851), but in the course of the 20th century it has become increasingly restricted to a flesh-andblood ‘person identical to another, double’.
=> double[doppelganger etymology, doppelganger origin, 英语词源]
doppelganger (n.)youdaoicibaDictYouDict
1830, from German Doppelgänger, literally "double-goer," originally with a ghostly sense. See double + gang (n.). Sometimes half-anglicized as doubleganger.