Thomas is -strictly speaking -a "side tank engine" -a steam locomotive that has tanks arranged on either side of the boiler.

严格地讲，这个叫做托马斯的火车头是一个两边都装有水和燃料罐的蒸汽火车。

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The steam engine uses a fire in a boiler rather than inside the engine.

蒸汽机所利用的事锅炉中的火，而不是发动机里边的火。

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The steam engine USES a fire in a boiler rather than inside the engine.

蒸汽机所利用的是锅炉中的火，而不是发动机里边的火。

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Flemish enthusiasts at Steam Center Maldegem, a heritage center in northern Belgium, recently spent a cold day cutting spare boiler screws for their stable, which includes a Polish-built steam engine, the "General Maczek, " named for the Polish general who helped liberate Belgium in World War II.

WSJ: Belgian Train Museum Had a Hard Time Getting on Track