发动机发出奇怪的声音，他立刻靠边停车。

The ___engine made a strange noise, so he pulled over right away.

我们的汽车引擎坏了，所以我们需要叫一辆出租车。

Our car ___engine is broken, so we need to call a taxi.

公共汽车的引擎声音很大。

The bus ___engine is very loud.