exemplar (n.)youdaoicibaDictYouDict[exemplar 词源字典]
late 14c., "original model of the universe in the mind of God," later (mid-15c.) "model of virtue," from Old French exemplaire (14c.) and directly from Late Latin exemplarium, from Latin exemplum "a copy, pattern, model" (see example). Related: Exemplarily.[exemplar etymology, exemplar origin, 英语词源]