For example, a film-maker might opt to include the background sound of an ambulance's siren while the foreground sound and image portrays an arguing couple.

例如，电影制作人可能会选择在背景中加入救护车的警笛声，而在前景的声音和图像中表现一对争吵的夫妇。

youdao

We walk for about an hour and a half, and then if we can resist the siren sound of the pub—which we usually can't—we come home.

我们走一个半小时，然后，如果我们能够忍受得了酒吧的警报声——通常我们忍受不了——我们就回家。

youdao

Another example is the word siren, familiar to us as the mechanical device that makes such an alarming sound when police cars, ambulances, or fire engines approach.

另一个例子是“警报器”这个词，是我们很熟悉的一个机械装置，当警车、救护车或消防车靠近时，警报器会发出警报。

youdao

But any attempt on my part to be alone meditating, showering, walking out into the hallway to dump trash down the chute results in that same siren sound.

NEWYORKER: A Box of Puppies

How many times have our hearts stopped in the middle of the night with the sound of a gunshot or a siren?

CNN: Obama's Father's Day speech