precedent

先例、前例

Letting one student skip the exam would set a dangerous precedent.

讓一名學生免考會開下危險的先例。

判例、先例法律

The court's ruling became a binding precedent for similar cases.

法院的裁決成為類似案件必須遵循的判例。

前所未有、史無前例多用於 without precedent

A storm of this size is without precedent in the region.

這種規模的風暴在該地區前所未有。

在先的、先前的正式

The report ignores the precedent events that caused the crisis.

這份報告忽略了引發危機的先前事件。