双语例句原声例句
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随着一天天衰老，我们的身体消耗热量的功能逐渐减弱。
As we get older, our bodies become less efficient at burning up calories.
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跑步是燃烧多余热量的有效办法。
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跑步是消耗多余热量的最好方法之一。
Running is one of the best ways to burn off excess calories.
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What's happening there? Well, the selection of reactants has been done judiciously to provide either heat or to provide something that's cool.
就会感到这东西，比如说变冷了，对吧？,这里发生了什么？这些反应物都是,被仔细的选出来的，能够提供热量或制冷。
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However, the thing to remember is, when you look at heats of reaction under those conditions it's all well and good.
相反，需要记住，当你需要知道反应中放出的热量时,这些量是很有用的。
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All right, so this is the heat flowing in or out of the system, and these are all functions of state.
好的，这就是系统的热量变化,这些都是态函数。
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