Nuclear energy may overtake oil as the main fuel.

核能可能会超过石油成为主要燃料。

《牛津词典》

Your body USES carbohydrates as its main fuel source.

你的身体将碳水化合物作为其主要的燃料来源。

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Further opening the throttle valve activated the main fuel jet.

当节流阀进一步打开时，主喷口开始工作。

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Indeed, coal would be the main fuel of the British economy for the next 350 years.

FORBES: Magazine Article

Petroleum caught on early as the main fuel source for internal combustion engines because it was plentiful and cheap to refine.

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But the main fuel is local anger over crime and migration.

ECONOMIST: Central Europe��s Roma