基本解释adj.不定期的n.不定期航线同根派生 英汉例句用作形容词 (adj.)The announcement points out, various education service wants the place bad to campus network news is prevented accuse to have fixed or nonsked supervisory examination.通知指出，地方各级教育行政部门要对校园网络不良信息防控进行定期或不定期的监督检查。