你拿燃料，而不是其他暖和的东西，把它放到大气中，它就会冷却下来。

You take fuel, rather you take something that's warm, and you put it in contact with the atmosphere, and then it cools down.

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这次爆发把巨额数量的岩土和灰尘抛向大气，随后使地球的温度冷却了好几个月。

The eruption flung vast amounts of dust and ash into the atmosphere, cooling global temperatures for months afterwards.

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此观念基于火山爆发对大气的冷却作用。

The concept is based on the cooling effect of volcano eruptions on the atmosphere.

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What you've built is an engine. You cool, you heat, you heat, you cool, you get back to the same place, but you've just done work to the environment.

这就是热机，我们用燃料或者热源加热，然后把它，与大气接触让它冷却。

麻省理工公开课 - 热力学与动力学课程节选

It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.

让它与大气接触冷却,改变约束，使它继续冷却，然后又再次加热,这就是循环热机，我们以前也研究过，更复杂的机器。

麻省理工公开课 - 热力学与动力学课程节选