two people or things that are not different from each other无差别的两个人（或事物）；半斤八两More Like This Expressions from literary sourcesExpressions from literary sources Word OriginFrom two characters in Through the Looking Glass by Lewis Carroll who look the same and say the same things.
Word Originoriginally names applied to the composers Bononcini (1670–1747) and Handel, in a 1725 satire by John Byrom (1692–1763); they were later used for two identical characters in Lewis Carroll's novel Through the Looking Glass.