substringWiktionary 原文英美构词拆解subsub-前缀stringstring词干sub-Under, beneath. · Subsidiary, secondary.词源说明From sub- + string.释义名词noun1(computing) A (possibly zero-length) string of characters that is contained in another string.动词verb1(computing, transitive) To extract a substring from.2(computing, transitive) To take as a substring.