ab extrayoudaoicibaDictYouDict[ab extra 词源字典]
"From without, from the outside", Early 17th cent.; earliest use found in John Healey (c1585–c1616), translator. From post-classical Latin ab extra from outside, from without from classical Latin ab from + extrā (adverb) without, outside.[ab extra etymology, ab extra origin, 英语词源]