exemplary (adj.)youdaoicibaDictYouDict[exemplary 词源字典]
1580s, "fit to be an example," from Middle French exemplaire, from Late Latin exemplaris "that serves as an example, pattern, or motto," from exemplum "example, pattern, model" (see example). Earlier (early 15c.) as a noun meaning "a model of conduct," from Late Latin exemplarium.[exemplary etymology, exemplary origin, 英语词源]