Drivers are urged to make sure that car engines are properly tuned.

司机们被要求要确保把汽车发动机调整好。

《柯林斯英汉双解大词典》

The earliest car engines ran on fuel made from corn and peanut oil, didn't they?

最早的汽车发动机使用的是由玉米和花生油制成的燃料，不是吗？

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I thought we could start by asking our audience what car engines were first designed to run on-fossil fuels or biofuels.

我想我们可以先问问观众哪种汽车引擎被最早设计为使用化石或生物燃料。

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Of course, going forward, new car engines would simply be designed to operate on natural gas.

FORBES: What Energy Policy?

It would also generate more energy, since power plants are more efficient than car engines.

ECONOMIST: Can biofuels save Europe, or the planet?

Our car engines had all stopped: nothing intimidates cars as much as their own cemeteries.

NEWYORKER: The Daughters of the Moon