1. a precedent
    • 先例にならう[を破る]
    • 「follow a [break with] precedent
    • これは先例がない
    • This is unprecedented./There is no precedent for this.
    • これは先例としないでください
    • Don't use this as a precedent.
    • それでは好ましくない先例を作ることになる
    • That would set [create/establish] an undesirable precedent.