The fire engines were just pulling up, sirens blaring.

救火车刚刚停下，警笛声还在尖利地响着。

The fire had burnt (itself) out before the fire engines arrived.

救火车到达之前火就熄灭了。

We stagger from our rooms in various states of undress to the sound of fire engines screaming round the corner, guaranteeing we are all wide awake.

我们穿着各式各样的衣服，摇摇晃晃地从房间里走出来，听到消防车在拐角处呼啸的声音，这保证了我们都是清醒的。

Look! There come fire engines.

看，消防车来了！

Fire engines are used for putting out big fires.

救火车是用来扑灭大火的。