警车刺耳的警笛声让所有人都转过头去。

The blaring ___siren of the police car made everyone turn their heads.

他听到了远处传来的警笛哀鸣声。

He heard the police ___siren wailing in the distance.

空袭警报器是即将到来的危险发出的令人不寒而栗的警告。

The air raid ___siren served as a chilling warning of the impending danger.