古老的惯例

【法】 immemorial usage

古老的英语翻译：

antiquity

惯例的英语翻译：

convention; routine; consuetude; practice; rite; rule; tradition; usage
【化】 convention
【医】 nomo-; rut
【经】 consuetude; customary rule; customs and usages; established practices
practice; routine; usage