On two separate morning visits to the scientists' lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel.

在科学家的实验室里，每个人分别在上午的两次访问中，以平均速度走了一个小时，理论上，他的身体应该主要依靠脂肪作为燃料。

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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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In other words, depression could fuel poor body image, which could cause a teenager to believe that his acne is worse than it is.

换句话说，抑郁会推动糟糕的身体形像产生，这会让一个青少年认为他的痤疮比实际上要严重的多。

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We're all familiar with the celebrity trainers, each taking unique approaches to help you properly fuel your body.

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The kid gets to fly for just a few dollars more than the cost of the extra fuel needed to haul his body and backpack.

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Once her body burns through that available sugar, it will next start burning body fat as fuel, and finally turn to protein once her fat stores are exhausted.

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