警方呼吁事故的目击者主动站出来。

Police are appealing for ___witnesses to the accident to come forward.

根据唯一的目击者所述，碰撞发生在十字路口。

According to the only ___witness, the collision happened at the crossroads.

关键目击者在法庭上提供了至关重要的证词。

The key ___witness provided crucial testimony in court.