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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According to a study of lab animals published online by the journal Obesity, eating during the hours that the body would naturally be sleeping may lead to excess weight gain.

根据《肥胖症》周刊在网上公布的一项动物实验表明，在身体本该睡觉的时候吃东西将会导致体重过量增加。

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Often, the science cited as evidence for the effectiveness of a compound was conducted in the lab on cells, rather than in the body of people.

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It also was conducted in a lab and so cannot account for the protection a human body might offer, such as layers of skin, bone and tissue.

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As part of the deal, HealthSouth adopted the nonprofit foundation next door, complete with a biomechanical lab for studying throwing motions and golf swings, and equipped with cadavers and synthetic body parts, enabling fellows to hone their surgical skills.

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