2 sentences

1. 远处传来了阵阵警笛声。

   yuǎn​chù chuán​lái le zhèn​zhèn jǐng​dí shēng.

   The sound of sirens could be heard in the distance.

   Source: Dong Chinese Dictionary

2. 我们有辆带警笛的救护车。

   wǒ​men yǒu liàng dài jǐng​dí de jiù​hù​chē.

   We have an ambulance with a siren.

   Source: OpenSubtitles