核能可能会超过石油成为主要燃料。

Nuclear energy may overtake oil as the main fuel.

《牛津词典》

许多人认为，玉米乙醇应该取代化石燃料气体，成为汽车的主要燃料。

There are many who argue that corn ethanol should replace fossil fuel gas as the primary source for running cars.

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人烟稠密的住宅区发生火灾时，房子总是取代树木，成为主要燃料。

In dense neighborhoods, houses replace trees as the primary fuel.

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