研究生科技英语阅读课文翻译对照(41)

睡眠缺失促进肥胖，因其干扰了这些饥饿激素。如果你克扣了睡眠时间，胃促生长素水平升高，使你饥饿，并且消瘦素下降，标志着需求热量。在实习期间我长期缺觉，因为每隔三个晚上我得通宵熬夜待在医院里。那年我的体重增加了不少，现在我明白为什么了。在那几年之后，我生了儿子亚力克斯后又增了好多磅——怀孕期间残留的二十磅，还有夜夜无眠陪着他的二十磅。他有急性腹痛且在他生命中的头六个月从未试过连续睡二十分钟以上。当我有了更多睡眠时间，我的体重开始更容易降下来。
Besides ghrelin and leptin, many other hormones play a role in appetite. Scientists have been looking for ways to control all these hunger hormones, but so far nothing usable has panned out.
除了胃促生长素和消瘦素，很多其他的激素对食欲也有影响。科学家一直在寻找控制这些饥饿激素的方法，但是目前还没有成果。
Hunger isn"t the only reason people eat and eat and eat. Stress, depression, boredom, loneliness, and even joy all come into play. And some of us may just be inclined to gain weight while others are not, due to genetics. Scientists are unclear as to how much of a role genetics plays in how chubby you are, but estimates range from as low as 20 percent to as high as 90 percent. In studies of twins, researchers have found that siblings wind up with similar body weights, whether or not they are raised in different families, and that adopted children are much more likely to grow to the size of their natural parents than their adoptive ones. Scientists speculate that part of the reason so many of us are susceptible to layering on fat is due to the "thrifty gene." Supposedly, it"s a gene passed down from our prehistoric ancestors who could eat a lot and build up reserves of fat to survive frequent famines. Genetically, this made sense when you didn"t know if your next meal would be tomorrow or a week from now, but when your next meal is whenever you drive by a fast-food restaurant, that"s a problem.